From the Minfos Till, with products added to a sale:
1. In the sales window, click the product that you want to discount, to highlight it.
2. Click Disc. $.
The Product Discount window is displayed.
Note: A product cannot be discounted if it is marked as non-discountable, or if it is a script. Till preferences can be changed to allow private scripts to be discounted.
3. Enter the discount dollar amount, percentage, or the total cost that the customer will pay for the product, then click Enter.
4. Complete the sale as normal.