Final answer:
The inventoriable cost per unit using variable costing for Fast Track Auto, which includes direct materials, direct manufacturing labor, and variable manufacturing costs, is $28 per unit.
Step-by-step explanation:
Calculating Inventoriable Cost Using Variable Costing
To calculate the inventoriable cost per unit using variable costing, we need to consider all the variable costs associated with producing a product. In the case of Fast Track Auto, the variable costs include direct materials, direct manufacturing labor, and variable manufacturing costs. Fixed manufacturing costs and administrative expenses are not included in variable costing. Therefore, the calculation for inventoriable cost per unit is as follows:
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- Direct materials: $20
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- Direct manufacturing labor: $5
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- Variable manufacturing costs: $3
Adding these costs together, we obtain an inventoriable cost of $28 per unit ($20 + $5 + $3).