Additional fees in check out aside from shipping and price of item.

[JosiahArtinian]

Hi guys,
I am running an online book store and the USPS module that I am using to calculate the shipping seems to automatically absorb my handling fee.

That is to say, if i have a handling fee on all transactions of 3 dollars if they actual shipping rate to a location is 7.50 when my customer goes through check out rather than the shipping rate being 10.50 it is just 7.50.

Is there a way that I can add a line in my checkout invoice for other fees? So I can clearly declare a "Rare book fee" or "Handling fee" or the like. Any ideas?

Thanks guys!