The Based On setting defines the type of Minimum Sale amount required before the formula applies.
The options are:
Line Qty - Quantity of a single line item.
Line Weight - Weight of a single line item.
Line $ Amount Extended - Dollar Amount of a single line item.
Line List Price Amount - List Price of a single line item.
Price Code Qty - Total Quantity of items with the same Price Code.
Price Code Weight - Total Weight of items with the same Price Code.
Price Code $ Amount - Extended Dollar Amount of items with same Price Code.
Price Code List Price Amount - Total List Price for items with the same Price Code.
Transaction Weight Total - Total Weight of all items on the Transaction.
Transaction Sub-Total - Sub-Total of an Invoice (w/o Discount, Shipping, Tax).
Transaction Sub-Total (w/o formulas) - Sub-Total of an Invoice (w/o formulas results).
Transaction List Price Total - The List Price Total.
Selling Price of all Other Items - Sub-Total of all other items on the Invoice.
See:
Price Tables - General Information
Configuration Manager Contents