The Adds Pick List allows you to create items that are frequently added to deals. This allows you to quickly enter items without having to type all the information.
Front Adds are generally items that you add to the vehicle itself.
Back Adds are generally services that are done to the vehicle and are sold in the finance office.
The MSRP columns are used for the purpose of lease calculations and weather or not the item may be included in the vehicles MSRP amount and if so the allowable amount.