diff --git a/src/assets/scss/components/formBuilder.scss b/src/assets/scss/components/formBuilder.scss
index b07f322..9382f37 100644
--- a/src/assets/scss/components/formBuilder.scss
+++ b/src/assets/scss/components/formBuilder.scss
@@ -58,6 +58,11 @@
     flex-direction: column;
     gap: 5px;
     align-items: flex-start;
+    
+    .tagHeader {
+      display: flex;
+      gap: 10px;
+    }
   }
 
   .label {
diff --git a/src/assets/scss/components/misc.scss b/src/assets/scss/components/misc.scss
index 8f89d4f..9f59541 100644
--- a/src/assets/scss/components/misc.scss
+++ b/src/assets/scss/components/misc.scss
@@ -31,6 +31,10 @@
   }
 }
 .p-tag {
+  &.p-tag-secondary {
+    background-color: var(--table-border-color);
+  }
+  
   .p-tag-value {
     color: var(--menuitem-active-color);
   }
@@ -147,7 +151,7 @@
   max-width: 100%;
 }
 
-.p-dropdown {
+.p-dropdown, .p-chips, .p-chips-multiple-container {
   width: 100%;
 }
 
diff --git a/src/pages/BandoFormsEdit/components/BuilderElement/index.js b/src/pages/BandoFormsEdit/components/BuilderElement/index.js
index 8a7b86e..9f5e0d0 100644
--- a/src/pages/BandoFormsEdit/components/BuilderElement/index.js
+++ b/src/pages/BandoFormsEdit/components/BuilderElement/index.js
@@ -1,7 +1,8 @@
-import React, { useRef } from 'react'
+import React, { useEffect, useRef, useState } from 'react'
 import { useDrag, useDrop } from 'react-dnd'
 import { ItemTypes } from '../ItemTypes';
 import { __ } from '@wordpress/i18n';
+import { head, isEmpty } from 'ramda';
 
 // store
 import { storeSet, useStore } from '../../../../store';
@@ -14,6 +15,10 @@ import BuilderElementProperLabel from '../BuilderElementProperLabel';
 const BuilderElement = ({ id, name, label, index, bandoStatus }) => {
     const draggingElementId = useStore().main.draggingElementId();
     const ref = useRef(null);
+    const elements = useStore().main.formElements();
+    const element = head(elements.filter(o => o.id === id));
+    const [isVariable, setIsVariable] = useState('secondary');
+    const [isFormula, setIsFormula] = useState('secondary');
 
     const [{ handlerId }, drop] = useDrop({
         accept: ItemTypes.FIELD,
@@ -97,6 +102,19 @@ const BuilderElement = ({ id, name, label, index, bandoStatus }) => {
     const opacity = isDragging ? 0 : 1;
     drag(drop(ref));
 
+    useEffect(() => {
+        const variable = head(element.settings.filter(o => o.name === 'variable'));
+        const formula = head(element.settings.filter(o => o.name === 'formula'));
+
+        if (variable && !isEmpty(variable.value)) {
+            setIsVariable('warning');
+        }
+
+        if (formula && !isEmpty(formula.value)) {
+            setIsFormula('warning');
+        }
+    }, [elements]);
+
     return (
         draggingElementId === id
             ? <div ref={ref} className="formBuilder__elementNew">
@@ -104,7 +122,13 @@ const BuilderElement = ({ id, name, label, index, bandoStatus }) => {
             </div>
             : <div ref={ref} className="formBuilder__element" style={{ opacity }} data-handler-id={handlerId}>
                 <div className="meta">
-                    <Tag value={label} severity="info"/>
+                    <div className="tagHeader">
+                        <Tag value={label} severity="info"/>
+                        {name === 'numberinput'
+                            ? <Tag value="var" severity={isVariable}/> : null}
+                        {name === 'numberinput'
+                            ? <Tag value="f(x)" severity={isFormula}/> : null}
+                    </div>
                     <BuilderElementProperLabel id={id} defaultLabel={label}/>
                 </div>
                 <div className="actions">
diff --git a/src/pages/BandoFormsEdit/components/BuilderElementSettings/components/ElementSetting/index.js b/src/pages/BandoFormsEdit/components/BuilderElementSettings/components/ElementSetting/index.js
index 67c1bf0..8a5d0c8 100644
--- a/src/pages/BandoFormsEdit/components/BuilderElementSettings/components/ElementSetting/index.js
+++ b/src/pages/BandoFormsEdit/components/BuilderElementSettings/components/ElementSetting/index.js
@@ -11,6 +11,7 @@ import { Editor } from 'primereact/editor';
 import { mimeTypes } from '../../../../../../configData';
 import ElementSettingTableColumns from '../ElementSettingTableColumns';
 import { InputSwitch } from 'primereact/inputswitch';
+import ElementSettingChips from '../ElementSettingChips';
 
 const ElementSetting = ({ setting, changeFn, updateDataFn, bandoStatus }) => {
 
@@ -24,6 +25,8 @@ const ElementSetting = ({ setting, changeFn, updateDataFn, bandoStatus }) => {
         mime: __('Tipo di file', 'gepafin'),
         text: __('Testo formattato', 'gepafin'),
         table_columns: '',
+        variable: __('Variable (only letters and "_")', 'gepafin'),
+        formula: __('Auto calculation formula', 'gepafin')
     }
 
     const renderHeader = () => {
@@ -85,6 +88,11 @@ const ElementSetting = ({ setting, changeFn, updateDataFn, bandoStatus }) => {
             return <InputSwitch
                 checked={setting.value}
                 onChange={(e) => changeFn(e.value, setting.name)}/>
+        } else if (['variable'].includes(setting.name)) {
+            return <ElementSettingChips
+                restrictedValues={[]}
+                changeFn={(value) => changeFn(value, setting.name)}
+                value={setting.value}/>
         } else {
             return <InputText id={setting.name} aria-describedby={`${setting.name}-help`}
                               value={setting.value}
diff --git a/src/pages/BandoFormsEdit/components/BuilderElementSettings/components/ElementSettingChips/index.js b/src/pages/BandoFormsEdit/components/BuilderElementSettings/components/ElementSettingChips/index.js
new file mode 100644
index 0000000..9b44a7e
--- /dev/null
+++ b/src/pages/BandoFormsEdit/components/BuilderElementSettings/components/ElementSettingChips/index.js
@@ -0,0 +1,43 @@
+import React, { useState } from 'react';
+
+// components
+import { Chips } from 'primereact/chips';
+
+const ElementSettingChips = ({ restrictedValues = [], changeFn, value }) => {
+    const [lastTyped, setLastTyped] = useState([])
+
+    const isValidValue = (newVal) => {
+        const validationRegex = /^[a-zA-Z_]+$/;
+        return validationRegex.test(newVal);
+    };
+
+    const handleAdd = (e) => {
+        const newValue = e.value[e.value.length - 1];
+
+        if (restrictedValues.includes(newValue)) {
+            changeFn([]);
+            return;
+        }
+
+        if (!isValidValue(newValue)) {
+            changeFn(lastTyped);
+            return;
+        }
+
+        setLastTyped(e.value)
+        changeFn(e.value);
+    };
+
+    return (
+        <div>
+            <Chips
+                value={value}
+                addOnBlur={true}
+                onChange={handleAdd}
+                max={1}
+            />
+        </div>
+    );
+}
+
+export default ElementSettingChips;
\ No newline at end of file
diff --git a/src/pages/BandoFormsEdit/components/BuilderElementSettings/components/ElementSettingTableColumns-old/index.js b/src/pages/BandoFormsEdit/components/BuilderElementSettings/components/ElementSettingTableColumns-old/index.js
deleted file mode 100644
index ee5d9aa..0000000
--- a/src/pages/BandoFormsEdit/components/BuilderElementSettings/components/ElementSettingTableColumns-old/index.js
+++ /dev/null
@@ -1,159 +0,0 @@
-import React, { useEffect, useState } from 'react';
-import { __ } from '@wordpress/i18n';
-import { wrap } from 'object-path-immutable';
-import { pathOr } from 'ramda';
-
-// components
-import { InputText } from 'primereact/inputtext';
-import { Button } from 'primereact/button';
-import { InputSwitch } from 'primereact/inputswitch';
-
-// tools
-import uniqid from '../../../../../../helpers/uniqid';
-
-const ElementSettingTableColumns = ({
-                                        value,
-                                        name,
-                                        setDataFn,
-                                        bandoStatus
-                                    }) => {
-    const [stateFieldData, setStateFieldData] = useState([]);
-    const [rowsData, setRowsData] = useState([]);
-
-    const removeItem = (index) => {
-        const newData = stateFieldData.toSpliced(index, 1);
-        setStateFieldData(newData);
-    }
-
-    const addNewItem = () => {
-        setStateFieldData([...stateFieldData, { name: uniqid('o'), label: '', predefined: false }]);
-    }
-
-    const addNewRow = () => {
-        const obj = stateFieldData
-            .filter(o => o.predefined)
-            .reduce((acc, cur) => {
-                acc[cur.name] = ''
-                return acc;
-            }, {});
-        setRowsData([...rowsData, obj]);
-    }
-
-    const removeRow = (index) => {
-        const newRowsData = wrap(rowsData).del([index]).value();
-        setRowsData(newRowsData);
-    }
-
-    const onInputChange = (e, index) => {
-        const { value } = e.target;
-        const newData = stateFieldData.map((o, i) => {
-            if (i === index) {
-                o.label = value;
-            }
-            return o;
-        })
-        setStateFieldData(newData);
-    }
-
-    const onSubInputChange = (e, name, index) => {
-        const { value } = e.target;
-        const newRowsData = wrap(rowsData).set([index, name], value).value();
-        setRowsData(newRowsData);
-    }
-
-    const setChecked = (value, index) => {
-        let name = '';
-        const newData = stateFieldData.map((o, i) => {
-            if (i === index) {
-                o.predefined = value;
-                name = o.name;
-            }
-            return o;
-        });
-
-        let newRowsData = [];
-
-        if (value === false) {
-            newRowsData = rowsData.map(o => wrap(o).set([name], '').value());
-        } else {
-            newRowsData = rowsData.map(o => wrap(o).set([name], '').value());
-        }
-
-        setRowsData(newRowsData);
-        setStateFieldData(newData);
-    }
-
-    const properField = (item, i) => {
-        return <>
-            <InputText value={item.label} onInput={(e) => onInputChange(e, i)}/>
-            <div className="flex-1">
-                <span>{__('Predefinito?', 'gepafin')}</span>
-                <InputSwitch
-                    checked={item.predefined}
-                    disabled={bandoStatus === 'PUBLISH'}
-                    onChange={(e) => setChecked(e.value, i)}/>
-            </div>
-        </>
-    }
-
-    const properSubField = (item, i, name) => {
-        return <InputText value={item[name]} onInput={(e) => onSubInputChange(e, name, i)}/>
-    }
-
-    useEffect(() => {
-        const stateFieldData = pathOr([], ['stateFieldData'], value);
-        setStateFieldData(stateFieldData);
-        const rowsData = pathOr([], ['rowsData'], value);
-        setRowsData(rowsData);
-    }, []);
-
-    useEffect(() => {
-        setDataFn(name, {
-            stateFieldData,
-            rowsData
-        });
-    }, [stateFieldData, rowsData]);
-
-    stateFieldData.filter(o => o.predefined)
-
-    return (
-        <>
-            <div className="formElementSettings__repeater">
-                {stateFieldData.map((o, i) => <div key={i} className="formElementSettings__repeaterItem">
-                    <div className="p-inputgroup flex-1">
-                        {properField(o, i)}
-                        <Button icon="pi pi-times" disabled={bandoStatus === 'PUBLISH'} className="p-button-danger" onClick={() => removeItem(i)}/>
-                    </div>
-                </div>)}
-                <Button type="button" disabled={bandoStatus === 'PUBLISH'} outlined label={__('Aggiungi', 'gepafin')} onClick={addNewItem}/>
-            </div>
-            {stateFieldData
-                .filter(o => o.predefined)
-                .map((o, i) => <div key={i} className="formElementSettings__repeaterItem">
-                    <div className="formElementSettings__repeater formElementSettings__subRepeater">
-                        <label>{__('Righe per colonna:', 'gepafin')} <strong>{o.label}</strong></label>
-                        <div className="formElementSettings__repeater">
-                            {rowsData.map((c, k) => {
-                                return <div key={k} className="formElementSettings__repeaterItem">
-                                    <div className="p-inputgroup flex-1">
-                                        {properSubField(c, k, o.name)}
-                                        <Button icon="pi pi-times"
-                                                disabled={bandoStatus === 'PUBLISH'}
-                                                className="p-button-danger"
-                                                onClick={() => removeRow(k)}/>
-                                    </div>
-                                </div>
-                            })}
-                            <Button type="button"
-                                    outlined
-                                    disabled={bandoStatus === 'PUBLISH'}
-                                    label={__('Aggiungi una riga', 'gepafin')}
-                                    onClick={addNewRow}/>
-                        </div>
-                    </div>
-                </div>)}
-        </>
-    )
-}
-
-export default ElementSettingTableColumns;
\ No newline at end of file
diff --git a/src/pages/BandoFormsEdit/components/BuilderElementSettings/index.js b/src/pages/BandoFormsEdit/components/BuilderElementSettings/index.js
index 3e4f66a..0c1eed9 100644
--- a/src/pages/BandoFormsEdit/components/BuilderElementSettings/index.js
+++ b/src/pages/BandoFormsEdit/components/BuilderElementSettings/index.js
@@ -160,7 +160,9 @@ const BuilderElementSettings = ({ closeSettingsFn, bandoStatus }) => {
                 <TabView className="formElementSettings__tabs">
                     <TabPanel header={__('Presentation', 'gepafin')}>
                         {settings
-                            ? settings.map((o) => <ElementSetting
+                            ? settings
+                                .filter(o => !['variable', 'formula'].includes(o.name))
+                                .map((o) => <ElementSetting
                                 key={o.name}
                                 setting={o}
                                 bandoStatus={bandoStatus}
@@ -248,6 +250,18 @@ const BuilderElementSettings = ({ closeSettingsFn, bandoStatus }) => {
                                 placeholder={__('Scegli', 'gepafin')}/>
                         </div>
                     </TabPanel>
+                    <TabPanel header={__('Calculation', 'gepafin')}>
+                        {settings
+                            ? settings
+                                .filter(o => ['variable', 'formula'].includes(o.name))
+                                .map((o) => <ElementSetting
+                                    key={o.name}
+                                    setting={o}
+                                    bandoStatus={bandoStatus}
+                                    changeFn={onChange}
+                                    updateDataFn={onUpdateOptions}/>)
+                            : null}
+                    </TabPanel>
                 </TabView>
 
                 <Button label={__('Salva', 'gepafin')} onClick={saveSettings}/>
diff --git a/src/pages/BandoFormsEdit/index.js b/src/pages/BandoFormsEdit/index.js
index b9ff73b..e26a69a 100644
--- a/src/pages/BandoFormsEdit/index.js
+++ b/src/pages/BandoFormsEdit/index.js
@@ -24,7 +24,7 @@ import set404FromErrorResponse from '../../helpers/set404FromErrorResponse';
 import BandoService from '../../service/bando-service';
 
 // TODO temp data
-//import { elementItems } from '../../tempData';
+import { elementItems } from '../../tempData';
 
 const BandoFormsEdit = () => {
     const { id, formId } = useParams();
@@ -215,8 +215,8 @@ const BandoFormsEdit = () => {
 
     const getElementItemsCallback = (data) => {
         if (data.status === 'SUCCESS') {
-            //storeSet.main.elementItems(elementItems.sort((a, b) => a.sortOrder - b.sortOrder));
-            storeSet.main.elementItems(data.data.sort((a, b) => a.sortOrder - b.sortOrder));
+            storeSet.main.elementItems(elementItems.sort((a, b) => a.sortOrder - b.sortOrder));
+            //storeSet.main.elementItems(data.data.sort((a, b) => a.sortOrder - b.sortOrder));
         }
         storeSet.main.unsetAsyncRequest();
     }
diff --git a/src/tempData.js b/src/tempData.js
index 372def6..987d314 100644
--- a/src/tempData.js
+++ b/src/tempData.js
@@ -92,7 +92,15 @@ export const elementItems = [
             {
                 name: "isRequestedAmount",
                 value: false
-            }
+            },
+            {
+                name: "variable",
+                value: ""
+            },
+            {
+                name: "formula",
+                value: ""
+            },
         ],
         validators: {
             isRequired: false,