Calculate Sales, Cost of Sales and Net Profit

An extract of the trial balance of Pamela Traders on 30 September 2020 is provided to you:

Pamela Traders
Extract of the trial balance on 30 September 2020
	Debit	Credit
	R	R
Sales		45 000
Purchases	29 500
Inventory (01/10/2019)	5 700
Freight on purchases	750
Postage	340
Wages	6 000
Advertising	1 900
Other Sundry expenses	2 500

Additional information:

Inventory on hand on 30 September 2020 amounts to R6 400. The periodic inventory system is in use.

Calculate the gross profit amount.