Answer:
a. (AR-SR)* Actual hours = Labour rate variance
Actual rate = (-3,850/2,750) + $17.60
Actual rate = -$1.4 + $17.60
Actual rate = $16.20
b. Direct labour efficiency variance for August = Total direct labour budget variance - Direct labour rate variance
= 1,430 - (-$3,850)
= $5280 Unfavourable
c. Direct Labour efficiency variance = (AH-SH)*SR
5280 = (2,750 - SH) * 17.60
(2,750 - Standard hours) = 5280/17.60
(2,750 - Standard hours) = 300
Standard hours = 2,750 - 300
Standard hours = 2,450