A manufacturer of plastic Products, reports the following manufacturing costs and account analysis classification for the year ended December? 31, 2014

Account                      Classification                  Amount

Direct materials        All variable                     $271,250

Direct manufacturing labor All variable          193,750

Power                                All variable             19,375

Supervision labor                25% variable           31,000

Materials-handling labor         60% variable      62,000

Maintenance labor                50% variable         69,750

Depreciation                         0% variable            110,000

Rent, property taxes, and administration     0% variable 105,000 .

The company produced 77,500 units of product in 2014. Management is estimating costs for 2015 on the basis of 2014 numbers. The following additional information is available for 2015

a. Direct materials prices in 2015 are expected to increase by 4 ?% compared with 2014 .

b. Under the terms of the labor? contract, direct manufacturing labor wage rates are expected to increase by 8 ?% in 2015 compared with 2014.

c. Power rates and wage rates for? supervision, materials handling, and maintenance are not expected to change from 2014 to 2015 .

d. Depreciation costs are expected to increase by 10 ?%, and rent, property taxes, and administration costs are expected to increase by 12 ?%.

e. They expects to manufacture and sell 87500 units in 2015 .

1. Prepare a schedule of? variable, fixed, and total manufacturing costs for each account category in 2015. Estimate total manufacturing costs for 2015.

2. Calculate Hamwey's total manufacturing cost per unit in 2014? and estimate total manufacturing cost per unit in 2015.

3. How can you obtain better estimates of fixed and variable costs? Why would these better estimates be useful to the company?