Calculate the cost of goods sold and gross profit and net profit from the following details. Particulars Amount (OMR) Stock (01-01-2018) 12,000 Purchases 50,000 Purchases Returns 3,500 Direct Wages 4,000 Office Salaries 2,800 Carriage inwards 2,400 Depreciation on Fixed assets 600 Office expenses 1,600 Stock (31-12-2018) 18,000 Sales 68,000 Sales Returns 2,000