A shopkeeper is selling an article at a discount of 12% on the marked...
Let the marked price be Rs 100.
Selling price of article = Marked price - 12% of Marked price
⇒ SP =100 - 100 × 12/100 = 88% of MP
Price paid by customer = Selling price + 8% of Marked price
⇒ Price paid by customer = 88% of MP + 8% of MP
⇒ 3360 = 96% of MP
⇒ MP = (3360×100)/96 = Rs. 3500
⇒ SP = 88/100 × 3500 = Rs. 3080
But, the shopkeeper earns a profit of 23.2%.
⇒ Cost price of article = (3080 × 100)/123.2 = Rs. 2500
⇒ Profit earned = 23.2% of 2500 = Rs. 580
Now, When the profit of shopkeeper increases by 50% and sales tax increases by 25%,
⇒ Increased profit of shopkeeper = 150% of 580 = Rs. 870
⇒ New selling price of article = 2500 + 870 = Rs. 3370
⇒ Increased sales tax = 125% of 8 = 10%
∴ New price of article = New selling price + 10% of MP
= 3370 + 10% of 3500
= 3370 + 350 = Rs. 3720
Hence, the correct option is (B).