Vat value of bill amount or amount received from flipkart

I sell to a flipkart customer and flipkart asks us to make the bill in customers name but with message "powered by Flipkart".

differnce in opinion by differnent people, some day as you are geeting money from flipkart, you can put vat value only on the amount you are receiving, some say only on the bill amount you already made.

Example:

Product sold to flipkart customer :  Rs. 100

flipkart commission:  (Rs. 15 commission +  50 shipping ) + 14% service tax

amount debited to my account by flipkart : 25.90 rupees

But the bill made to the customer is of Rs.100

while filing VAT what should i put this value of transaction ? 100 or 25.90

If 100 ? what are the options available where we can incorporate in the invoice through which we can file vat only at the amount flipkart provides to us. 

if we are paying vat on Rs.100 we are paying vat even on the commission+service tax+shipping charged by flipkart