Garber Plumbers Offers a 20% Trade Discount When Providing $2,000

Garber Plumbers offers a 20% trade discount when providing $2,000 or more of plumbing services to its customers.In March 2012,Garber provided $4,000 of plumbing services to Red Oak,Inc.and $1,500 of services to Cyril,Inc.Each of these customers was granted credit terms of 2/10,net 30.If both customers paid for the plumbing services within the discount period,what was the net sales figure for these two transactions?

A) $5,500.
B) $4,312.
C) $4,486.
D) $4,606.