Given
Output Tax (tax collected at the time of sale) = Rs. 1,22,500
Input Tax (tax paid at the time of purchase) = Rs. 1,00,500
∴ Input Tax Credit, ITC = Rs. 1, 00, 500
We know that GST Payable = Output Tax – ITC
⇒ GST Payable by Chetana stores = 1, 22, 500 – 1, 00, 500
= Rs. 22, 000