Answer:
Allowance for Doubtful Account
Accounts written off $56 Beginning balance $375
[$375+$14-$333]
Bad debt expense $14
Ending balance $333
Accounts Receivable (Gross)
Beginning balance $13,389 Accounts written off $56
[$13014+$375]
Net sales revenue $69,943 Cash collected $67,956
[$13389+$69943-$56-$15320]
Ending balance $15,320
[$14987+$333]