MDI Enterprises prepared the following income statement for June:

Sales revenue (6,000 units)$150,000

Cost of goods sold:

Fixed costs$18,000

Variable costs30,00048,000

Gross profit102,000

Operating expenses:

Fixed costs27,000

Variable costs12,00039,000

Operating income$ 63,000

How much is MDI's total contribution margin?

$120,000

$105,000

$108,000

$93,000