Statement of Profit / Loss

Please could somebody help me to solve how to adjust these heading under statement of Profit / Loss. Please ignore the values they are random but I just want to know how they are treated in the right way?

Sales(Revenue) – 80000
Sales Return(Return Inward) – 5000
Opening Inventory – 40000
Purchases – 42000
Carriage Inward – 2000
Discount Received – 1000
Closing Inventory – 60000
Purchase Return – 2000
Carriage outward -1500
Discount allowed – 500
Increase in allowance for receivables- 4000
Depreciation – 2000
Irrecoverable Debts – 3500

Thanks