Answer:
$2.66
Step-by-step explanation:
Data provided in the question:
Incurred activity cost = $456,000
Number of units inspected = 120,000
Limiting percentage of inspection = 30% of the production
Now,
Inspection cost per unit before improvement
= (Incurred activity cost) ÷ ( Number of units inspected )
= $456,000 ÷ 120,000
= $3.8 per unit
And, after the improvement
Units to be inspected = 30% of 120,000
= 0.30 × 120,000
= 36,000 units
Therefore,
Total inspection cost = 36,000 × $3.8
= $136,800
Thus,
Cost per unit after improvement
= $136,800 ÷ 120,000
= $1.14 per unit
Thereofre,
The difference in activity cost = $3.8 - $1.14
= $2.66