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Answer and Explanation:
The computation is shown below:
a. Unit product cost under variable costing is
Direct material $25
Add: Direct labor $20
Add: Variable manufacturing overhead $1
Unit product cost $46
b. The preparation of the contribution income statement is presented below:
Sales (3,000 units × $108) $324,000
Less: Variable cost of
goods sold (3,000 units × $46) ($138,000)
Less: Variable selling
and administrative expense (3,000 units × $14) ($42,000)
Contribution margin $144,000
Less: Fixed manufacturing overhead ($64,530)
Less: Fixed selling and administrative expense ($9,000)
Net operating income $70,470
c. The absorption costing net operating income is
Net operating income under variable costing $70,470
Less: Fixed manufacturing
overhead (955 units - 345 units) × $27 ($16,470)
Net operating income under absorption costing $54,000
The $27 come from
= $64,530 ÷ 2,390 units
= $27
If the company produces the same number of units every month, although the sales in units vary from month to month.
- The unit product cost for the month under variable costing is $46
- The income statement for the month using variable costing is $70,470
- The absorption costing net operating income for the month is $86,940
a. Calculation of per unit Variable Cost of Goods sold
Direct Material Per unit $25
Direct Labor Per unit $20
Variable Manufacturing overhead $1
Variable Cost of Goods sold Per unit $46
b. The income statement for the month using variable costing
Income statement
Variable Costing Income Statement
Sales $324,000
($108×3,000)
Variable Expenses:
Variable Cost of Goods Sold $138,000
(3,000×46)
Variable Selling and Administrative Expense $42,000
(3,000×$14)
Contribution Margin $144,000
[$324,000-($138,000+$42,000)]
Fixed Expenses:
Fixed manufacturing overhead $ 64,530
Fixed selling and administrative expense $9,000
Total Fixed Expenses $73,530
( $64,530+$9,000)
Net operating income $70,470
($144,000-$73,530)
c. The absorption costing net operating income for the month
First step is to calculate the Fixed manufacturing overhead per unit
Using this formula
Fixed manufacturing overhead per unit = Fixed manufacturing overhead ÷ Units produced
Let plug in the formula
Fixed manufacturing overhead per unit= $ 64,530 ÷ 2,390 units
Fixed manufacturing overhead per unit= $27 per units
Second step is to calculate the Manufacturing overhead deferred in inventory using this formula
Manufacturing overhead deferred in inventory = Fixed manufacturing overhead in ending inventory – Fixed manufacturing overhead in beginning inventory
Let plug in the formula
Manufacturing overhead deferred in inventory = [$27 per unit × 955 units-345 units]) – $0
Manufacturing overhead deferred in inventory = $16,470
Third step is to compute the Absorption costing net operating income
Variable costing net operating income $70,470
Add fixed manufacturing overhead costs deferred in inventory under absorption costing $16,470
Absorption costing net operating income $86,940
($70,470+$16,470)
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