Answer:
Total Machining cost assigned to Product Z = $390000
Step-by-step explanation:
Lets assume the total machine hours to be 1000 hours.
Out of these 10000 hours, 25% hours are used by Porduct 5 and the remaining 75% hours are used by Product Z.
The overheads are distributed using the Overhead Absorption Rate.
OAR Machining = 520000 / 10000 = 52 per Machine Hour
The machine hours used by product z is 0.75 * 10000 = 7500 hours
Maching cost assigned to Product Z = 7500 * 52 = $390000