** You must enable allow trade in option at terminal settings.
1. Login your POS system, then scan or type your product code/product barcode.
2. You can also input product by pressing F1 key or click on Product.
3. Then input your product code criteria and search.
4. After that, press F2 key or click on Qty button.
5. Then put your quantity that you want to return with negative (-) in front of it.
6. Next, click on Trade In button or press F9.
7. Enter your trade in cost for the product.
8. Next, click on Cash or press F4 key.
9. Then choose your trade in payment method.
