To create a product with no price so that you can adjust the price on the sell screen.
- Vend for Mac or PC
- Navigate to Products
- Click Add Product
- Give the Product a name e.g. "Miscellaneous"
- Uncheck Track Inventory for this product
- Click Save
Editing the price of a product on the sell screen will affect discount reporting. Increasing the price of a product will register as a negative discount, decreasing the price will register as a positive discount.