Answer:
$660 (credit balance)
Explanation:
the question is missing the numbers, so I looked for a similar one:
The journal entry to record warranty liability:
Dr Warranty expense 880
Cr Warranty liability 880
the journal entry to record actual money spent repairing defective units:
Dr Warranty liability 220
Cr Cash 220
the balance of the warranty liability account at the end of the month = $880 - $220 = $660