diff --git a/modules/ticket/back/methods/sale/updateDiscount.js b/modules/ticket/back/methods/sale/updateDiscount.js
index 641182076..1539a4283 100644
--- a/modules/ticket/back/methods/sale/updateDiscount.js
+++ b/modules/ticket/back/methods/sale/updateDiscount.js
@@ -1,15 +1,19 @@
 let UserError = require('vn-loopback/util/user-error');
 
 module.exports = Self => {
-    Self.remoteMethodCtx('updateDiscount', {
+    Self.remoteMethod('updateDiscount', {
         description: 'Changes the discount of a sale',
         accessType: 'WRITE',
         accepts: [{
-            arg: 'params',
-            type: 'object',
+            arg: 'ticketFk',
+            type: 'number',
             required: true,
-            description: 'sale ID, newDiscount, price',
-            http: {source: 'body'}
+            description: 'ticket id',
+        }, {
+            arg: 'sales',
+            type: ['object'],
+            required: true,
+            description: 'sale ID, newDiscount, price, ticket',
         }],
         returns: {
             type: 'string',
@@ -21,12 +25,16 @@ module.exports = Self => {
         }
     });
 
-    Self.updateDiscount = async(ctx, params) => {
-        if (isNaN(params.editLines[0].discount))
+    Self.updateDiscount = async(ticketFk, sales) => {
+        const validDiscounts = sales.every(sale => {
+            return !isNaN(sale.discount);
+        });
+
+        if (!validDiscounts)
             throw new UserError(`The value should be a number`);
 
         let model = Self.app.models;
-        let ticket = await model.Ticket.findById(params.editLines[0].ticketFk, {
+        let ticket = await model.Ticket.findById(ticketFk, {
             include: {
                 relation: 'client',
                 scope: {
@@ -38,25 +46,28 @@ module.exports = Self => {
         if (ticket.refFk)
             throw new UserError(`The sales of this ticket can't be modified`);
 
-        let componentToUse;
+        let manaDiscount;
+        let buyerDiscount = await model.ComponentRate.findOne({where: {code: 'buyerDiscount'}});
         let usesMana = await model.WorkerMana.findOne({where: {workerFk: ticket.client().salesPersonFk}, fields: 'amount'});
+        let componentId = buyerDiscount.id;
+        console.log(usesMana);
+        if (usesMana) {
+            manaDiscount = await model.ComponentRate.findOne({where: {code: 'mana'}});
+            componentId = manaDiscount.id;
+        }
 
-        if (usesMana)
-            componentToUse = 37;
-        else
-            componentToUse = 34;
+        for (let i = 0; i < sales.length; i++) {
+            let currentLine = await model.Sale.findOne({where: {id: sales[i].id}, fields: 'price'});
+            let value = ((-currentLine.price * sales[i].discount) / 100);
 
-        for (let i = 0; i < params.editLines.length; i++) {
-            let currentLine = await model.Sale.findOne({where: {id: params.editLines[i].id}, fields: 'price'});
-            let value = ((-currentLine.price * params.editLines[i].discount) / 100);
-            await model.SaleComponent.upsert({saleFk: params.editLines[i].id, value: value, componentFk: componentToUse});
+            await model.SaleComponent.upsert({saleFk: sales[i].id, value: value, componentFk: componentId});
 
-            await model.Sale.update({id: params.editLines[i].id}, {discount: params.editLines[i].discount});
+            await model.Sale.update({id: sales[i].id}, {discount: sales[i].discount});
         }
 
         if (usesMana) {
-            query = `
-            call vn.manaSpellersRequery(?)`;
+            query = `call vn.manaSpellersRequery(?)`;
+
             await Self.rawSql(query, [ticket.client().salesPersonFk]);
         }
     };
diff --git a/modules/ticket/front/sale/editDiscount.html b/modules/ticket/front/sale/editDiscount.html
index cdc5f0839..7648d2ddc 100644
--- a/modules/ticket/front/sale/editDiscount.html
+++ b/modules/ticket/front/sale/editDiscount.html
@@ -2,16 +2,15 @@
     <h5>MANÁ: {{$ctrl.mana | currency: 'EUR':0}}</h5>
 </vn-horizontal>
 <div pad-medium>
-    <vn-textfield
+    <vn-input-number
         vn-focus
         label="Discount"
         model="$ctrl.newDiscount"
-        type="text"
         on-change="$ctrl.updateDiscount()">
         <t-right-icons>
             <span class="filter">%</span>
         </t-right-icons>
-    </vn-textfield>
+    </vn-input-number>
     <div class="simulator">
         <p class="simulatorTitle" translate>New price</p>
         <p>{{($ctrl.edit[0].quantity * $ctrl.edit[0].price) 
diff --git a/modules/ticket/front/sale/editDiscount.js b/modules/ticket/front/sale/editDiscount.js
index 3df684ff3..0694c67d5 100644
--- a/modules/ticket/front/sale/editDiscount.js
+++ b/modules/ticket/front/sale/editDiscount.js
@@ -38,12 +38,15 @@ class Controller {
         let modified = false;
         for (let i = 0; i < this.edit.length; i++) {
             if (this.newDiscount != this.edit[0].discount || this.bulk || !this.newDiscount) {
-                editLines.push({id: this.edit[i].id, discount: this.newDiscount, ticketFk: this.$state.params.id});
+                editLines.push({id: this.edit[i].id, discount: this.newDiscount});
                 modified = true;
             }
         }
+
         if (modified) {
-            this.$http.post(`/ticket/api/Sales/updateDiscount`, {editLines}).then(() => {
+            const ticketId = parseInt(this.$state.params.id);
+            const params = {ticketFk: ticketId, sales: editLines};
+            this.$http.post(`/ticket/api/Sales/updateDiscount`, params).then(() => {
                 this.vnApp.showSuccess(this.$translate.instant('Data saved!'));
                 this.clear();
                 modified = false;
@@ -53,7 +56,7 @@ class Controller {
 
             this.onHide();
         } else
-            this.vnApp.showError(this.$translate.instant('There is no changes to save'));
+            this.vnApp.showError(this.$translate.instant('There are no changes to save'));
     }
 
     clear() {
diff --git a/modules/ticket/front/sale/editDiscount.spec.js b/modules/ticket/front/sale/editDiscount.spec.js
index 2fef13106..e48fdbb63 100644
--- a/modules/ticket/front/sale/editDiscount.spec.js
+++ b/modules/ticket/front/sale/editDiscount.spec.js
@@ -69,7 +69,7 @@ describe('Ticket', () => {
                 spyOn(controller.vnApp, 'showError');
                 controller.updateDiscount();
 
-                expect(controller.vnApp.showError).toHaveBeenCalledWith('There is no changes to save');
+                expect(controller.vnApp.showError).toHaveBeenCalledWith('There are no changes to save');
             });
         });