Answer:
efficiency variance  $15,050.00  FAVORABLE
Explanation:
[tex](standard\:hours-actual\:hours) \times standard \: rate = DL \: efficiency \: variance[/tex]
std  hours       14,000.00
actual hours        11,850.00
std rate               $7.00
difference         2150.00
efficiency variance  $15,050.00
standar hours: 4hs per unit times 3,500 units produced during the period
             equal to 14,000 hours
The diference is positive, so the variance is favorable