Assume that X Company has total variable costs of $90,000 when 30,000 units are sold. If 50,000 units were sold, total variable costs would be:
a. $100,000
b. $120,000
c. $130,000
d. $150,000

VC 90,000 / 30,000 units = $3 of VC per unit

$3 x 50,000 = $150,000

d. $150,000