Greys standard labor cost of producing one unit of Product A1 is 1.6 hours at a rate of $10.4 per hour. During August, 1560 hours were incurred at a cost of $12.8 per hour to produce 1261 units of Product A1.

Greys direct labor efficiency variance is $__________ Indicate the amount and whether it is Favorable or Unfavorable by placing F or U by amount, do not skip a space and do not use $ in your answer.

For example, if your answer is $1,000 favorable, answer 1000F

How do you know that the answer is favorable?