Help with correction of errors and omissions please

Hi can someone please help me to answer this question. I have recieved a list of individual debtors balance and these total £30,338 i have 5 errors and omisions that i need to adjust in order to reconcile the sales ledger control a/c i have a balance b/d of £60,744 :?

1. one of the pages in the sales day book has been added up incorrectly its been recorded as
£52,334 when it should be £ 25,334

2.certain bad debts have been written off in control a/c but no entries have been made in the subsidiary a/c the bad debts need adjustment total £2412

3. A debtor balance of £5668 has been completely omitted from the list of individual balances

4. A cash refund of
£3,450 given to a debtor for faulty goods has been adjusted on the individual list of balances but no entry made in SLC

5 A subsidiary ledger a/c has been listed as a debit balance of £13,740 insted of the correct amount of £17,340