Answer:
c. $ 14,238
Explanation:
Computation of costs in the flexible budget
Planned activity 716 units
Budgeted cost per unit $ 18 per frame
Total planned variable cost - 716 units * $ 18 $ 12,888
Fixed monthly cost $ 1,350
Total supplies cost in flexible budget for June $ 14,238
The other information regarding the actual costs and actual production are not required for determining the budgted cost for supplies.