Japan Company produces lamps that require $2$ standard hours per unit at a standard hourly rate of $$16\mathrm{.}30$ per hour. Production of $5,300$ units required $10,390$ hours at an hourly rate of $$16\mathrm{.}00$ per hour.

What is the direct labor $($a$)$ rate variance, $($b$)$ time variance, and $($c$)$ total cost variance? Enter favorable variances as negative numbers.

a$.$ Direct labor rate variance

b$.$ Direct labor time variance

$

$

$$

c$.$ Total direct labor cost variance

$

$$

$$