A Shoe Store Gets a 50-Percent Discount from the Manufacturer

A shoe store gets a 50-percent discount from the manufacturer when it places a $5000 order.The discount percentage increases when the amount of the purchase order increases.This is an example of a(n) :

A) seasonal discount.
B) cumulative quantity discount.
C) odd price.
D) non-cumulative quantity discount.
E) cash discount.