Karenderia-multiple-restaurant-system food inventory

Karenderia Multiple Restaurant Files Included JavaScript JS, HTML, CSS, PHP, SQL Software Framework Yii i want to add a simple food inventory management to this application Description The merchant must have the ability to put a number of the available food item and after the sale from web or mobile app to reduce the stock and when the stock is zero to display a msg ïtem not available"or öut of stock" . i prefer the freelancer must have knowledge of this script [login to view URL] please bid logical price in order we start work thanks