Darnell Poston, owner of Poston Manufacturing, Inc., wants to determine the cost behavior of labor and overhead. Darnell pays his workers a salary; during busy times, everyone works to get the orders out. Temps (temporary workers hired through an agency) may be hired to pack and prepare completed orders for shipment. During slower times, Darnell catches up on bookkeeping and administrative tasks while the salaried workers do preventive maintenance, clean the lines and building, etc.
Temps are not hired during slow times. Darnell found that workers€™ salaries, temp agency payments, rentals, utilities, and plant and equipment depreciation are the largest dollar accounts. He believes that workers€™ salaries and plant and equipment depreciation are fixed, temp agency payments are associated with the number of orders (since temp workers are used to pack and prepare completed orders for shipment), and electricity is associated with the number of machine hours. When the number of different parts stored by Poston exceeds the space in the materials storeroom, Darnell rents nearby warehouse space. He can rent as much or as little space as he wants on a month-to-month basis. Therefore, he believes warehouse rental payments are variable with the number of parts purchased and stored. The account balances for the past six months as well as the six-month total are as follows:

Information on number of machine hours, orders, and parts for the six-month period follows:

Required:
1. Calculate the monthly average account balance for each account. Calculate the average monthly amount for each of the three drivers.
2. Calculate fixed monthly cost and the variable rates for temp agency payments, warehouse rent, and electricity. Express the results in the form of an equation for total cost.
3. In July, Darnell predicts there will be 420 orders, 250 parts, and 5,900 machine hours. What is the total labor and overhead cost for July?
4. What if Darnell buys a new machine in July for $24,000? The machine is expected to last 10 years and will have no salvage value at the end of that time. What part of the cost equation will be affected? How? What is the new expected cost in July?

Transcribed Image Text:

Temp Agency Payments Electricity Depreciation S43,200 S1,700 $3,410 $13,200 Machine FHours Number of Orders Number of Parts January February March April May June Total 2,000 3,100 5,800 6,200 6,500 6,000 29,600 10 40 350 400 510 410 1.720 200 600 550 580 570 300 2,800