Compute the variable overhead rate variance, variable overhead efficiency variance, fixed overhead budget variance, and fixed overhead volume variances for the following:

Norwall Company's variable manufacturing overhead should be $1.20 per standard machine-hour

and its fixed manufacturing overhead should be $81,744 per month.

The following information is available for a recent month:

a.The denominator activity of 31,440 machine-hours is used to compute the predetermined overhead rate.

b.At the 31,440 standard machine-hours level of activity, the company should produce 13,100 units of product.

c.The company's actual operating results were:

Number of units produced14,120

Actual machine-hours32,540

Actual variable manufacturing overhead cost $42,302

Actual fixed manufacturing overhead cost $82,900