Answer:
a. Direct labor rate
variance (favorable)
–$1,400 [($16.50 – $17.00) × 2,800 hrs.]
b.
Direct labor time
variance (favorable)
–$3,400
[(2,800 hrs. – 3,000 hrs.) × $17.00]
c.
Direct labor cost
–$4,800
(–$1,400 – $3,400) or
variance (favorable) [($16.50 × 2,800 hrs.) – ($17.00 × 3,000 hrs.)]
= $46,200 – $51,000