To add in a discount or up charge within a reservation using the Custom Line Item,
1. Go to the DASHBOARD and click into a reservation
2. Click on the PRODUCTS tab
3. Under Custom Line Item, fill out the appropriate information such as Name, Cost, and Quantity
4. To add in a discount, place a minus in front of the amount you wish to discount within Cost. To add in an up charge, simply type in the amount needed
5. Click ADD when finished
