Grey's standard labor cost of producing one unit of Product A$1$ is $1\mathrm{.}6$ hours at a rate of $$10\mathrm{.}4$ per hour. During August, $1,560$ hours were incurred at a cost of $$12\mathrm{.}8$ per hour to produce $1,261$ units of Product A$1.$

Grey's 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 $1000F$