Zee Corporation has developed the following cost standards for the production of its leather backpacks:

Standard Cost Per BackpackLeather (2.1 yards $24 per yard)$50.40Direct labor (2.4 hours $9.00 per hour)$21.60Variable overhead (2.4 hours $15.20 per hour)$36.48

Variable overhead at Zee is applied on the basis of direct labor hours. The actual results for last month were as follows:

Number of backpacks produced13,000Direct labor hours incurred30,380Yards of leather purchased28,980Yards of leather used in production28,410Cost of leather purchased$646,254Direct labor cost$232,407Variable overhead cost$472,409

The direct materials purchases variance is computed when the materials are purchased.

Required:

Compute the following variances for Zee.

a. Materials price variance.

b. Materials quantity variance.

c. Labor efficiency variance.

d. Variable overhead rate variance.