QUESTION 12 Speedy Supplies sells a product at a price of $150. It's variable manufactured cost is $30 and the variable marketing cost per unit is $17.50 with fixed cost per period of $60,000. What would be the change in operating income under variable costs if sales increase from 10,000 to 10,500 units? O $51,250 O $60,000 O Loss of $8,750 $66,250