Answer:
Under applied overhead for the month is $3,272
Explanation:
Predetermined Overhead Rate = Estimated factory Overhead / Estimated Machine hours
Predetermined Overhead Rate = $1,128,900 / 21300
Predetermined Overhead Rate = $53 per machine hour
Applied factory overhead = 2,940 x 53
Applied factory overhead = $155,820
Under applied overhead = 159,092 - 155,820
Under applied overhead = $3,272