Laval produces lamps and home lighting fixtures. Its most
popular product is a brushed aluminum desk lamp. This lamp is made
from components shaped in the fabricating department and assembled
in the assembly department. Information related to the 36,000 desk
lamps produced annually follows.
Direct materials | $ | 260,000 | |
Direct labor | |||
Fabricating department (6,500 DLH × $26 per DLH) | $ | 169,000 | |
Assembly department (15,600 DLH × $25 per DLH) | $ | 390,000 | |
Machine hours | |||
Fabricating department | 15,200 | MH | |
Assembly department | 20,800 | MH | |
Expected overhead cost and related data for the two production
departments follow.
Fabricating | Assembly | |||||
Direct labor hours | 220,000 | DLH | 245,000 | DLH | ||
Machine hours | 162,000 | MH | 133,000 | MH | ||
Overhead cost | $ | 390,000 | $ | 425,000 | ||
Required
1. Determine the plantwide overhead rate for Laval
using direct labor hours as a base.
2. Determine the total manufacturing cost per unit
for the aluminum desk lamp using the plantwide overhead rate.
3. Compute departmental overhead rates based on
machine hours in the fabricating department and direct labor hours
in the assembly department.
4. Use departmental overhead rates from
requirement 3 to determine the total manufacturing cost per unit
for the aluminum desk lamps.
1. Total direct labor hrs for both departments = 220,000 + 245,000 = 465,000
Total overhead cost = 390,000 + 425,000 = 815,000
Plantwide overhead rate on the basis of direct labor hrs = 815,000/ 465,000
= $1.75 per hr
2.
Direct materials | 260,000 |
Direct labor | |
- Fabricating | 169,000 |
- Assembly | 390,000 |
Overhead [(6,500 + 15,600) x 1.75] | 38,675 |
Total mfg cost | 857,675 |
Units produced | 36,000 |
Mfg cost per unit | $23.82 |
3. Fabricating = Overhead cost/ Total machine hrs
= 390,000/ 162,000
= 2.41
Assembly = Overhead cost/ Total labor hrs
= 425,000/ 245,000
= 1.73
4.
Direct materials | 260,000 |
Direct labor | |
- Fabricating | 169,000 |
- Assembly | 390,000 |
Overhead [(6,500 + 15,600) x 1.75] | 38,675 |
- Fabricating [15,200 x 2.41] | 36,632 |
- Assembly [20,800 x 1.73] | 35,984 |
Total mfg cost | 930,291 |
Units produced | 36,000 |
Mfg cost per unit | $25.84 |
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