Answer:
The answer is: NONE OF THE ABOVE, IT SHOULD BE $6,210 underapplied
Explanation:
First we calculate the estimated cost per direct labor hour:
If only 21,550 direct labor hours were employed, then the estimated cost for total labor hours should have been $495,650 (= $23 x 21,550), but instead the total cost was $501,860 which is $6,210 underapplied. The actual cost per direct labor hour is $23.29 (= $510,860 / 21,550).