Money spent to buy the apples = ₹ 100
Money spent to sell the apples = ₹ 150
Profit on apples= ₹ 150 - ₹ 100 = ₹50
Money spent to buy the bananas = ₹ 100
Money spent to sell bananas = ₹ 120
Profit on bananas= ₹ 120 - ₹ 100 = ₹20
Total profit earned by him = ₹50 + ₹20 = ₹70