QUESTION 12 Chit Chat Company applies manufacturing overhead costs to products on the basis of direct labor-hours. The standard cost card shows that 6 direct labor-hours are required per unit of product. The company estimated that it would work 180,000 direct labor-hours and incur the following manufacturing overhead costs for the month of March: Total fixed overhead costs Total variable overhead costs $237,600 $198,000 During March, the company completed 28,000 units of product, worked 172,000 direct labor-hours, and incurred the following total manufacturing overhead costs: Total fixed overhead costs Total variable overhead costs $230,600 $197,800 The denominator activity used to calculate its predetermined overhead rate was 180,000 direct labor-hours. Requirement: Calculate manufacturing overhead variances