Ruby Company produces a chair that requires a standard $3$ yards of material per unit. The standard price of one yard of material is $$10\mathrm{.}80.$ During the month, $7,700$ chairs were manufactured, using $23,300$ yards at a cost of $$11\mathrm{.}45$ per yard.

Determine the $($a$)$ direct materials price variance, $($b$)$ direct materials quantity variance, and $($c$)$ total direct materials cost variance. Enter favorable variances as negative numbers.

a$.$ Direct materials price variance $fill in the blank $1$

b$.$ Direct materials quantity variance $fill in the blank $3$

c$.$ Total direct materials cost variance $fill in the blank $5$