A shopkeeper initially marks the price of a shirt at Tk. 80 and allows a 20% discount. If the cost price of the shirt is Tk. 60, what is the profit percentage after selling 10 each shirts?

Question: A shopkeeper initially marks the price of a shirt at Tk. 80 and allows a 20% discount. If the cost price of the shirt is Tk. 60, what is the profit percentage after selling 10 each shirts?

Solution:
Given that,
Marked Price = Tk. 80
Discount = 20%
Cost Price = Tk. 60

∴ Discount = 20% of 80 = 0.20 × 80 = Tk. 16
And selling Price = 80 - 16 = Tk. 64

The cost price (CP) of the shirt is Tk. 60. Profit is the difference between the selling price and the cost price.
∴ Profit per shirt = SP - CP = 64 - 60 = Tk. 4
Now, Total Cost for 10 shirts = 10 × 60 = Tk. 60
∴ Total Profit for 10 shirts = 10 × 4 = Tk. 40

∴ Profit Percentage = (Total Profit/Total Cost ) × 100%
= (40/600) × 100%
= 6.67%