If a shopkeeper buys 21 erasers for ₹ 20 per eraser and then sells further 20 erasers for ₹ 21 per eraser. How much profit or loss does the shopkeeper make?
1
Loss for ₹ 15
2
Profit for ₹ 20
3
Profit for ₹ 30
4
Loss for ₹ 25
If a shopkeeper buys 21 erasers for ₹ 20 per eraser and then sells further 20 erasers for ₹ 21 per eraser. How much profit or loss does the shopkeeper make?