Answer:
advertizing expense 387 debit
prepaid expense 387 credit
--to record expired advertizing at year-end ---
Explanation:
1,548 is the value of 36 months
from April to December 31th 9 months has expired thus:
1,548 x 9/36 = 387 expired advertizing
we will decrease our prepaid and post the advertizing expense for the expired amount
the prepaid is considered an asset as we have the right to receive advertize of our product and brand for the term of the contract thus, to decrease it we credit
the expense as decrease our equity will be debited
