This field is in the Bin Label Report (RBL).
A = “Print List Price if Promo Price is less than List.” If you place a checkmark in this field, then if the promo price in Modify Item Promotions (MIP) is less than the List price, RBL prints the List price on the label, instead of the promo price. This option was designed to comply with Minimum Advertised Price (MAP) restrictions, whereby the retailer is not allowed to advertise a price that is less than the vendor’s MAP price for certain product lines.
Note: You should also use Promotion Update Report (RUP) option V “Set promo price to list if promo is less than list" when starting a promotion that must comply with MAP standards.