Justin has attempted to write up his own nominal ledger but is very confused about debits and credits. He realises he has made some mistakes and has asked you to correct the following receivables ledger control account: Receivables ledger control account $ $ Balance b/d 12,460 Cash sales 4,430 Sales on credit 15,520 Cheques from credit customers 11,650 Purchase ledger contra 1,600 Discounts allowed 890 Balance c/d 12.610 29,580 29,580 The opening balance is correct. What should the closing balance be? O A. $9,410 O B. $13,840 C. $17,040 D. $15,620