Nerrod Company Sells Its Products at $500 Per Unit,net 30

Multiple Choice

Nerrod Company sells its products at $500 per unit,net 30.The firm's gross margin ratio is 40 percent.The firm has estimated the following operating costs:
Nerrod Company has gathered the following data pertaining to activities it performed for two of its customers:
What is Nerrod's total sales-sustaining cost applicable to XBT as a customer?

A) $0.
B) $920.
C) $4,120.
D) $6,300.
E) $6,420.