Completion Status: $47,703 QUESTION 4 Which of the following may be the likely reason for a favorable direct labor rate variance? overestimated standard labor cost. changes to the product specification which reduced manufacturing time. reduction in direct labor costs due to a strike in the factory. overestimated standard labor time per unit. QUESTION 5 Which of the following would explain an unfavorable variable overhead efficiency variance? (1) Employees were in the candard: (2) Unexpected idle time resulted from a series of machine breakdown; (3) Poor Quak