Answer:
15,000 underapplied
Step-by-step explanation:
We will calculate the applied overhead but first, we need the predetermined overhead rate:

the expected overhead will be divided by the cost driver which is machine hours.
1,200,000 / 400,000 = 3
now we multiply by the actual output of machienhours:
380,000 x 3 = 1,140,000
lastly, we compare with the actual overhead cost:
1,140,000 - 1,155,000 = 15,000
as the actual cost were higher than applied we underapplied the overhead.