Oriole Company's standard labor cost of producing one unit of Product DD is $3\mathrm{.}90$ hours at the rate of $$13\mathrm{.}20$ per hour. During August, $40,800$ hours of labor are incurred at a cost of $$13\mathrm{.}30$ per hour to produce $10,300$ units of Product DD$.$

$($a$)$

Compute the total labor variance.

Total labor variance

$

$($b$)$

Compute the labor price and quantity variances.

Labor price variance

$ $$

Labor quantity variance

$ $$

$($c$)$

Compute the labor price and quantity variances, assuming the standard is $4\mathrm{.}2$ hours of direct labor at $$13\mathrm{.}50$ per hour.

Labor price variance

$

Labor quantity variance

$