Let the shopkeeper buy the article at ₹x.
For him CP = ₹x and SP = ₹9000
CGST paid to the government = ₹162
⇒ SGST paid to the government = ₹162
[0.5 Marks]
So, total GST paid = ₹162 + ₹162 = ₹324
[0.5 Marks]
⇒ GST collected (Input Tax Credit) - GST paid on purchase = ₹324
[0.5 Marks]
⇒ 18% of ₹9000 - 18% of ₹x = ₹324
⇒ 18x100 = ₹ 1620 - ₹324
⇒ 18x100 = ₹1296
⇒ x = ₹7200
[1 Mark]
So, for the shopkeeper, the cost price of the article is ₹7200.
[0.5 Marks]