Rate of Gross Profit (on cost) = 25%
Rate of Gross Profit (on sales) = 20%
Gross Profit = 20% of 1,00,000 = 20,000
Gross Profit = Net Sales – Cost of Goods Sold
20,000 = 1,00,000 – Cost of Goods Sold
Cost of Goods Sold = 1,00,000 – 20,000 = ₹ 80,000
Cost of Goods Sold = Opening Stock + Purchases + Direct Expenses – Closing Stock
80,000 = 18,000 + 69,000 + 10,000 – Closing Stock
Closing Stock = 18,000 + 69,000 + 10,000 – 80,000 = ₹ 17,000