The Mayor package is typically $225.00 US in the store, but with the 10% discount it comes up as "$25.00 US"
https://gyazo.com/500d6f4085f3a2a08da0566fcee67df4
http://i.imgur.com/RUFSA4O.gif
It is correct.
Typically it is 250$ and then with 10% off it is 225$
Then it would be 225 - x = 25$
x being what you've already paid
I reckon you have the proprietor package from sale?