Use the Information Below to Answer the Following Question(s)

Use the information below to answer the following question(s) .
The following data for a pottery company pertain to the production of 2,000 clay pots during July.
Direct Materials (all materials purchased were used) :
Standard cost: $6.00 per kilogram of clay
Total actual cost: $11,200
Standard cost allowed for units produced was $12,000
Materials efficiency variance was $240 unfavourable
Direct Manufacturing Labour:
Standard cost is 2 pots per hour at $24.00 per hour
Actual cost per hour was $24.50
Actual labour was 972 hours
-What is the direct manufacturing labour efficiency variance?

A) $672 unfavourable
B) $500 favourable
C) $672 favourable
D) $500 unfavourable