diff --git a/services/loopback/common/methods/sale/updatePrice.js b/services/loopback/common/methods/sale/updatePrice.js
new file mode 100644
index 000000000..be0b5af31
--- /dev/null
+++ b/services/loopback/common/methods/sale/updatePrice.js
@@ -0,0 +1,64 @@
+module.exports = Self => {
+    Self.remoteMethod('updatePrice', {
+        description: 'Changes the discount of a sale',
+        accessType: '',
+        accepts: [{
+            arg: 'params',
+            type: 'object',
+            required: true,
+            description: 'sale ID, newPrice',
+            http: {source: 'body'}
+        }],
+        returns: {
+            type: 'string',
+            root: true
+        },
+        http: {
+            path: `/updatePrice`,
+            verb: 'post'
+        }
+    });
+
+    Self.updatePrice = async params => {
+        if (!params.price) params.price = 0;
+        let model = Self.app.models;
+        let thisTicketIsEditable = await model.Ticket.isEditable(params.ticketFk);
+
+        if (!thisTicketIsEditable)
+            throw new Error(`The sales of this ticket can't be modified`);
+
+        let ticket = await model.Ticket.find({
+            where: {
+                id: params.ticketFk
+            },
+            include: [{
+                relation: 'client',
+                scope: {
+                    fields: ['salesPersonFk']
+                }
+            }],
+            fields: ['id', 'clientFk']
+        });
+
+        let usesMana = await model.WorkerMana.findOne({where: {workerFk: ticket[0].client().salesPersonFk}, fields: 'amount'});
+        let currentLine = await Self.app.models.Sale.findOne({where: {id: params.id}, fields: 'price'});
+        let componentToUse;
+
+        if (usesMana)
+            componentToUse = 37;
+        else
+            componentToUse = 34;
+
+        let value = (params.price - currentLine.price);
+
+        let query = `INSERT INTO vn.saleComponent(saleFk, componentFk, value)
+                        VALUES(?, ?, ?) ON DUPLICATE KEY UPDATE value = value + ?`;
+
+        await Self.rawSql(query, [params.id, componentToUse, value, value]);
+
+        await Self.app.models.Sale.update({id: params.id}, {price: params.price});
+        query = `
+            call vn.manaSpellersRequery(?)`;
+        await Self.rawSql(query, [ticket[0].client().salesPersonFk]);
+    };
+};