Answer:
See below
Step-by-step explanation:
a. Labor rate variance for the month
= (SR - AR) × AH
= ($16.70 - ($87,360/5,200 hours)) × 5,200
= ($16.70 - $16.8) × 5,200
= $520 Unfavourable
b. Labor efficiency variance
= (SH - AH) × AR
(4.4 × 1,100) - 5,200) × $16.70
= (4,840 - 5,200) × $16.70
= $6,012 Unfavourable