Ruby Company produces a chair for which the standard specifies $3$ yards of material

per unit. The standard price of one yard of material is $$11\mathrm{.}00.$ During the month, $8,300$

chairs were manufactured, using $25,400$ yards at a cost of $$11\mathrm{.}55$ per yard.

Determine the following: Enter favorable variances as negative numbers.

a$.$ Direct materials price variance

b$.$ Direct materials quantity variance

c$.$ Total direct materials cost variance