These birdhouses are available in three models: mini, deluxe
and castle. The deluxe model has been manufactured for the years. The
additional models were added to appeal to a broader customer base. Sales of the
castle have skyrocketed while the company’s profits have steadily declined.
Management has become concerned about the accuracy of its costing system.
Manufacturing overhead is assigned to products on the basis
of direct labor hours. For the current year, the company has estimated that it
will incur $993,750 in manufacturing overhead cost and produce 2,500 units of
the mini, 15,000 of the deluxe and 7,500 units of the castle. Direct material
and direct labor cost per units are as follows:
|
|
Model
|
|
Mini
|
Deluxe
|
Castle
|
|
Direct Materials
|
$ 12.50
|
$ 15
|
$ 20
|
|
Direct Labor
|
$ 10
|
$ 20
|
$ 45
|
The mini takes .4 direct labor hours per unit, the deluxe
takes .8 direct labor hours per unit, and the castle uses 1.8 labor hours per
unit. (Direct labor cost per hour is $25)
Required:
1.
Using a traditional product costing system with
one plantwide overhead rate based on direct labor-hours as the basis for
assigning manufacturing overhead cost to the products, compute the
pre-determined overhead rate. Determine the unit cost of each of the models
using the one overhead rate.
2.
Management is considering switching to an
activity-based costing (ABC) system to apply manufacturing overhead costs to
each model. A review of the manufacturing process has resulted in the following
cost pools:
|
Machining
|
Number of machine hours
|
$ 600,000
|
|
Assembling
|
Number of parts
|
$ 250,000
|
|
Packaging
|
Number of finished units
|
$
143,750
|
|
Total Overhead Cost
|
$ 993,750
|
|
Activity Measure
|
Model
|
|
Mini
|
Deluxe
|
Castle
|
Total
|
|
Machining
|
100,000
|
1,000,000
|
1,400,000
|
2,500,000
|
|
Assembling
|
1,150
|
50,000
|
75,000
|
126,150
|
|
Packaging
|
2,500
|
30,000
|
15,000
|
47,500
|
3.
Compute the activity rates for each of the three
activity cost pools. Using these rates, determine the amount of manufacturing
overhead to be applied to each model. Then calculate the cost per unit for each
model (material, labor, and manufacturing overhead).
4.
Use your answers from requirements 1-3 to
identify factors that may account for the company’s declining profits.
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