It brings the price down to $49.56 for adults....and be sure to take your ticket to the guest services before you leave the park and they will give you a second day for free!
You will need access to a printer as you print the ticket from home...but if you're in a hotel they should be able to print it for you....or try the local office supply store, or even a public library.
I thought Busch Gardens was currently having a promo where you buy an adult ticket but pay the child ticket price. Second day to the same park is also still free.