update the cash book for bank charges, bank interest paid and received, correction of errors, credit transfers, direct debits, dividends, and standing orders
explain the dual function of the cash book as a book of prime entry and as a ledger account for bank and cash
prepare purchases ledger and sales ledger control accounts to include credit purchases and sales, receipts and payments, cash discounts, returns, irrecoverable debts, dishonoured cheques, interest on overdue accounts, contra entries, refunds, opening and closing balances (debit and credit within each account)