Answer: 17000F
Step-by-step explanation:
The labor efficiency variance based on the information provided in the question would be calculated as:
= (Standard hours - Actual hours) × Standard rate
= (40000 - 38000) × 8.50
= 2000 × 8.50
= 17000 favourable
Note;
Standard hours = 10000 × 4 hours = 40,000 hours