Answer:
Predetermined overhead rate is $9 per labor hour
Explanation:
Estimated Direct-labor hours = 10,000
Estimated Manufacturing overheads = Estimated Fixed overheads + Estimated variable overheads
Estimated Manufacturing overheads = $50,000 + $40,000
Estimated Manufacturing overheads = $90,000
Predetermined overhead rate = Estimated Manufacturing overheads / Estimated Direct-labor hours
Predetermined overhead rate = 90,000 / 10,000 = $9 per labor hour