Sally used Refine Renovations to finish ber basement. Since the organization was classed as a professional contractos, when they purchase paint and carpeting, Refine Renovations received large discounts from the base price. What is this discount called?

select one:

a$.$ pronsotional allowance

b$.$ functional $($or trade$)$ discouet

c$.$ curmulative or soncumulative quantity discount

d$.$ rebate allowance