Given the following contribution income statement, how many units must this company sell in order to earn $30,000 profit? Total Unit Sales Revenue ( 1,000 units) $100,000 $100 Variable Expenses 60,000 60 Contribution Margin $ 40,000 $40 Fixed Expenses 36,000 Operating Income $ 4,000 a. 660 O b.850 c. 1,650 O d. 1,100 Oe. 340