Introduced useSum Composable

composables/useSum.js

@@ -0,0 +1,21 @@
+
+export const useSum = () => {
+
+    const getIncomingInvoiceSum = (invoice) => {
+        let sum = 0
+        invoice.accounts.forEach(account => {
+             console.log(account)
+
+
+            sum += account.amountTax
+            sum += account.amountNet
+
+
+
+        })
+        return sum.toFixed(2)
+    }
+
+    return {getIncomingInvoiceSum}
+
+}