uestion ot yet swered MCT Company sells a single product. 4,000 units were sold resulting in $80,000 of sales revenue, $56,000 of variable costs, and $12,000 of fixed costs. If sales increase by 600 units, operating income will increase by ($): arked out of O a. 3,600 00 O b. 12,000 Flag question O c. 4,200 O d. None of the amounts given O e. 4,800 NEXT PAGE Fin