视频:
1. 首先在後台產品主檔內設置產品的次數
    (First set product count from POS Admin)



2. 前台下載數據後, 選擇客戶購買這件產品,上傳數據到後台
   (Download date in the cashier then choose customer buy the product count then upload date)


3. 前台選擇回這個客戶, 按計次銷售便可使用次數
   (Choose the customer and click count selling use the count. Upload data can check the count be used.)