Suspense and error

How can the solution for this question be : J Jones extracted the following trial balance from his books on 31 January 19-2
Capital….,……………………………….,……………………….. .. 7450
Drawings……………………………….3000
Stock,………………….,……………….2500
Trade debtors……,,…………………2950
Trade creditors………,…,…………..,……………,……………,..2684
Shop fittings….,……………………..1530
Purchases,………….,,………………..5140
Sales……………………………………,………………………………7460.
General expenses………….,………860

Discount received …………………………….,,……………………40

Cash at bank …..,,……………………1660

Returns outward………………………………………………………40
THE TOTALS: DEBIT=£17640. CREDIT=£17674

The following errors and omissions were subsequently discovered:

a) A purchase of shop fittings £320 had been debited to purchases account.

b). Sales invoice of £150 entered in the sales day book had not been posted to the customers personal account.
c). A credit note for £30 issued by J Jones to a customer had been completely omitted from the books of accounts.
d). A credit Balance of £16 in the purchases ledger had been omitted from the trial balance.
e). The sales day book was under cast by £100 in December 19-1

Draw up a corrected trial balance. Show all workings.

THANKS.