<!doctype html> <html ng-app> <head> <title>TEST</title> <script src="angular.js"></script> </head> <body> <div ng-init="y=1;c=2"> <b>Invoice:</b> <div> Quantity: <input type="number" ng-model="y" required > </div> <div> Costs: <input type="number" ng-model="c" required > </div> <div> <b>Total:</b> {{500*y * c}} </div> </div> </body> </html>
