unadjusted trail balance(December 31,2008)(Bed Bugs R Us Ltd):

prepaid rent $8,000
rent expense $24,000

adjusting entry question: 4 months worth of prepaid rent had been purchased on September 1 2007 in an adjacent building to b used as thier office. The rent on this space was set at $2,000 per month.

I have to make an adjusted journal entry!!!

To make the adjusted journal entry for the prepaid rent, you need to account for the portion that has expired and should be recognized as an expense.

Since the prepaid rent was purchased on September 1, 2007, and 16 months have passed since then (as of December 31, 2008), you need to calculate the amount of prepaid rent that has expired.

To do this, multiply the monthly rent ($2,000) by the number of months that have expired (16):

$2,000 * 16 = $32,000

The amount of prepaid rent that has expired and needs to be recognized as an expense is $32,000.

To make the adjusted journal entry, you would debit the Rent Expense account for $32,000 and credit the Prepaid Rent account for $32,000. The entry would look like this:

Date | Account | Debit | Credit
------------------------------------------------------------------------------
Dec 31, 2008 | Rent Expense | $32,000 |
Dec 31, 2008 | Prepaid Rent | | $32,000

By recording this adjusted entry, you are recognizing the expense of $32,000 for the 16 months of prepaid rent that have expired, and reducing the Prepaid Rent account by the same amount.