Answer:
b. $6.50 per machine-hour
Explanation:
The computation of the predetermined overhead rate is
= Total fixed manufacturing overhead cost ÷ Total machine-hours + Variable manufacturing overhead per machine-hour
= $294,000 ÷ 70,000 + $2.30
= $4.20 + $2.30
= $6.50 per machine-hour
Therefore, all the other information that is given are irrelevant. Hence, ignored it