XYZ Corp. produces and sells headphones for $75.00 per unit. In the first month of operation, 2,000 units were produced and 1,750 units were sold. Actual fixed costs are the same as the amount budgeted for the month. Other information for the month includes:

Variable manufacturing costs	$20.00 per unit
Variable marketing costs	$3.00 per unit
Fixed manufacturing costs	$7.00 per unit
Administrative expenses, all fixed	$15.00 per unit
Ending inventories:
Direct materials	0
WIP	0
Finished goods	250 units

What is cost of goods sold per unit using variable costing?

A) $45

B) $30

C) $20

D) $23