Rate of Gross Profit (on cost) = 50%
Rate of Gross Profit (on sales) = 33.33%
Gross Profit = 33.33% of (1,05,000) = 35,000
Gross Profit = Net Sales – Cost of Goods Sold
35,000 = 1,05,000 – Cost of Goods Sold
Cost of Goods Sold = 1,05,000 – 35,000 = ₹ 70,000
Cost of Goods Sold = Opening Stock + Purchases + Direct Expenses – Closing Stock
70,000 = Opening Stock + 60,000 + 3,000 – 20,000
Opening Stock = 70,000 – 60,000 – 3,000 + 20,000 = ₹ 27,000