Answer:
a) $19610 credit
Explanation:
Given: Accounts receivables as on Dec 1, 2017 = $12770
Credit sale during the month = $34200
Collections during the month = $27360
Accounts Receivable balance at the end of the month = Opening Accounts Receivable balance + credit sales during the month - cash collected during the month
= $12770 + $34200 - $27360
Accounts Receivable balance as on Dec 31, 2017 = $19610 credit