The marked price of an article = ₹9000 and rate of GST on it is 18%. A shopkeeper buys this article at a reduced price and sells it at its marked price.

If the shopkeeper pays ₹162 as CGST to the government as part of his net tax liability, find the amount (excluding GST) paid (in ₹) by the shopkeeper for the article.


A ₹3600
B ₹7200
C ₹1800
D ₹9800