A price discount where the discount is based on the total quantity purchased over a given period,regardless of the number of lots purchased over that period,is

A) customer based.
B) lot size based.
C) supplier based.
D) volume based.

A discount based on the total quantity purchased over a given period is known as a volume-based discount. It is not dependent on the lot size or the customer, but rather on the total volume purchased, hence the name. It is typically offered by suppliers to incentivize larger purchases and to reward consistent customers over time.