How do you implement GST in Website X5?

Also how to introduce GST and CESS on GST on Beverages articles in Website X5?

For example Cold Drink in India has 28% GST on Cost and 12% Cess on GST on Cost price.

A total of 40% (28% GST and 12% Cess). Also some article as education Cess on GST.

For example a product cost 100 and has 18% GST. and 2% Cess on GST.

total cost of product will be 100 + 100X18% + 2%(100X18%) = 100+18 (GST)+ 0.36 (CESS on GST)

How do I implement that in Website X5 and sell products?

Regards

Rohit