Question $\backslash$#$425$ Points

Tim Morgan's Speed and Marine is trying to establish the standard labor cost of a typical overhead valve$/$cam repair. The following data have been collected from time and motion studies conducted over the past month.

Required

$($a$)$ What should the standard direct labor hours per repair be$?$

$($b$)$ Calculate the standard direct labor hourly rate.

$($c$)$ Calculate the standard direct labor cost per repair.

$($d$)$ If an overhead valve$/$cam repair took $12\mathrm{.}25$ hours at the standard hourly rate, what was the direct labor quantity variance?