Acosta Supplies experienced the following costs in 2017:

Direct materials $1.50 per unit

Direct labor $4.50 per unit

Variable manufacturing overhead $2.00 per unit

Variable selling $1.00 per unit

Fixed manufacturing overhead $70,000

Fixed selling and administrative$80,000

During 2017, the company manufactured 4,000 units and sold 4,200 units. Assume the same unit costs in all years. Beginning inventory consists of 800 units. How much are total variable costs on the company's 2017 contribution margin income statement?

A.$36,000

B.$33,600

C.$32,000

D.$37,800