To begin, locate the item you are looking to discount within the Contracts section of your project. Scroll down, find the item, and select the three-dotted edit symbol. Select Edit from the drop down menu.
A pop-up menu will appear for you to edit the item. Navigate to the Discount box. Here you can choose to make the change by percentage or by dollar amount. Enter the discount and press Save.
The discount will be applied in your project inventory.
Note: this discount will NOT be displayed in your actual inventory. It is a one-time only discount.