Birkner Corporation's flexible budget performance report for last month shows that actual indirect materials cost, a variable cost, was $30,444 and that the spending variance for indirect materials cost was $8,142 favorable. During that month, the company worked 17,700 machine-hours. Budgeted activity for the month had been 18,200 machine- hours. The cost formula per machine-hour for indirect materials cost must have been closest to Multiple Choice $1.23 $1.26 $2.12 $2.18