Vienna Company uses direct labor hours as the overhead application base. The (partial) cost sheet for the single product manufactured follows. Direct labor Variable overhead Fixed overhead (5 hours @ $20) (5 hours @ $2) (5 hours @ $4) $100 10 20 The master budget level of production is 12,000 units of the product with 60,000 direct-labor hours. Other information available for operations over the past accounting period includes the following. Actual variable overhead incurred Actual fixed overhead incurred Budgeted fixed overhead Direct labor efficiency variance Variable overhead price (spending)variance $110,000 253,000 240,000 140,000 U 4,000 F Required: a. What was the variable overhead efficiency variance? 6. What was the fixed overhead price (budget) variance? c. What was the fixed overhead production volume (volume) variance? For all requirements, indicate the effect of each variance by selecting "F" for favorable, or "U" for unfavorable. If there is no effect, do not select either option.) a. Variable overhead efficiency variance b. Fixed overhead price variance C. Fixed overhead production volume variance