Answer:
OAR = $4 per machine hour
Explanation:
Plant wide overhead absorption rate (OAR)
= Estimated overhead/Estimated total machine hours
Estimated machine hours = (5 × 1000) +( 8× 2000) = 21,000 machine hours
OAR = $84,000/21,000 machine hour= $4 per machine hour
OAR = $4 per machine hour