Exercise 21-20 Computation of volume and controllable overhead variances LO P3 World Company expects to operate at 80% of its productive capacity of 68,750 units per month. At this planned level, the company expects to use 31,900 standard hours of direct labor. Overhead is allocated to products using a predetermined standard rate of 0.580 direct labor hours per unit. At the 80% capacity level, the total budgeted cost includes $70,180 fixed overhead cost and $405,130 variable overhead cost. In the current month, the company incurred $473,000 actual overhead and 28,900 actual labor hours while producing 52,000 units. (1) Compute the overhead volume variance. (2) Compute the overhead controllable variance.