Apply a Discount to a Displayed Rate

Hi there,

So our uses a software called shipstation. It allows us to be able to print labels and also sign up for services like UPS, Fedex, etc and get discounted rates. The problem is they don’t give us access to an account number or anything. I was able to make a UPS account in order to get the plug-in to work, however of course the rates are way off. About 55%.

I know I can purchase the premium plug-in, but to be honest I don’t need any of the other features that the premium plug-in offers. Is there some sort of function I can add to my theme’s php that will just apply a fixed percentage discount to the rate the plugin receives from UPS?