Hi guys, I dont quite understand how the discount will be calculated, please tell me.

Man, this is very simple. See how the discount will be calculated the first time. This is a quote from a technical document.
The token will hold a value of $0.01 for discounts for the first couple of months since release (we made
deals with brand with this price set in place), or until listing on an exchange. The maximum amount of
discount will depend on the deal with the brand. The brand also decides at what price it will accept the
tokens.