Riveria Co. makes and sells a single product. The current selling price is $39 per unit. Variable expenses are $17 per unit, and fixed expenses total $39,500 per month. Sales volume for May totaled 4,550 units. Required: a. Calculate operating income for May. b. Calculate the break-even point in terms of units sold and total revenues. (Round your intermediate calculations to the nearest whole dollar.) c. Management is considering installing automated equipment to reduce direct labor cost. If this were done, variable expenses would drop to $11 per unit, but fixed expenses would increase to $64,100 per month. c-1. Calculate operating income at a volume of 4,550 units per month with the new cost structure. c-2. Calculate the break-even point in units with the new cost structure. c-3. Why would you suggest that management seriously consider investing in the automated equipment and accept the new cost structure? As sales volume moves above the break-even point, contribution margin and operating income will? By a relatively greater amount than under the old cost structure.