Mile-High Foods, Inc., was formed in March 2011 to provide prepackaged snack boxes for a new low cost regional airline beginning on April 1. The company has just leased warehouse space central to the two airports to store materials. To move packaged materials from the warehouses to the airports, where final assembly will take place, Mile-High must choose whether to lease a delivery truck and pay a full-time driver at a fixed cost of $5,000 per month, or pay a delivery service a rate equivalent to $0.40 per box. This cost will be included in either fixed manufacturing overhead or variable manufacturing overhead, depending on which option is chosen. The company is hoping for rapid growth, as sales forecasts for the new airline are promising. However, it is essential that Mile-High managers carefully control costs in order to be compliant with their sales contract and remain profitable. Ron Spencer, the company's president, is trying to determine whether to use absorption, variable, or throughput costing to evaluate the performance of company managers. For absorption costing, he intends to use the practical-capacity level of the facility, which is 20,000 boxes per month. Production-volume variances will be written off to cost of goods sold.
Costs for the three months are expected to remain unchanged. The costs and revenues for April, May, and June are expected to be as follows:
Sales revenue $6.00 per box
Direct material cost $1.20 per box
Direct manufacturing labor cost $0.35 per box
Variable manufacturing overhead cost $0.15 per box
Variable delivery cost (if this option is chosen) $0.40 per box
Fixed delivery cost (if this option is chosen) $5,000 per month
Fixed manufacturing overhead costs $15,000 per month
Fixed administrative costs $28,000 per month
Projected production and sales for each month follow. High production in May is the result of an anticipated surge in June employee vacations.
April/May/June sale (units) 12,000/12,500/13,000
April/May/June Production 12,200/18,000/9,000

Required
1. Compute operating income for April, May, and June under absorption costing, assuming that Mile-High opts to use
a. the leased truck and salaried driver.
b. the variable delivery service.
2. Compute operating income for April, May, and June under variable costing, assuming that Mile-High opts to use
a. the leased truck and salaried driver.
b. the variable delivery service.
3. Compute operating income for April, May, and June under throughput costing, assuming that Mile-High opts to use
a. the leased truck and salaried driver.
b. the variable delivery service.
4. Should Mile-High choose absorption, variable, or throughput costing for evaluating the performance of managers? Why? What advantages and disadvantages might there be in adopting throughput costing?
5. Should Mile-High opt for the leased truck and salaried driver or the variable delivery service? describebriefly.