Based on the information given the unit cost of job #420 is $2.00 per unit.
First step:
Total cost of Job #420= Direct materials + Direct Labor + Over head (Predetermined overhead rate x Direct labor costs)
Total cost of Job #420= $4,000 + $5,000 + 1.20 x $5,000
Total cost of Job #420= $4,000 + $5,000 +$6,000
Total cost of Job #420= $15,000
Second step:
Unit product cost=Total cost of Job #420/Units
Unit product cost = $15,000/7,500 units
Unit product cost= $2.00 per unit
Inconclusion the unit cost of job #420 is $2.00 per unit.
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