Output tax = 5% of 90000
= (5/100) × 90000
= Rs.4500 Input tax = 5% of 85000
= (5/100) × 85000
= Rs. 4250
ITC = Rs.4250.
∴ GST payable = Output tax – ITC
= 4500 – 4250
GST payable = Rs.250
∴ ITC of Smt. Malhotra is Rs.4250 and amount of GST payable by her is Rs.250.