A different way may be to just be able to add an attribute to the right of the price of all products within a category. Is that possible?
Assume I can get rid of the currency of all prices.
Basically:
all prices within cat=”1″ would look like 123#
all prices within cat=”2″ would look like 123@
This would be if I made a text attribute of # for cat=”1″ and a text attribute of @ for cat=”2″
I would also be happy if I need to add an attribute to each product.