Please solve it

Solution :-

Net Sales = 1,00,000
Let Assume when cost is 100 then,
Cost + Profit = Sales
100 + 33.33 = 133.33

Gross Profit = 33.33 x 1,00,000 / 133.33
= 24,998(approx.)
= 25,000
Cost of Goods sold = Sales - Gross Profit
= 1,00,000 - 25,000
= 75,000