checkout

Hello Library Gurus,
The Space Foundation announced the establishment of the Zimkas Space Library, honoring a really cool guy who has been a tireless advocate for Space Foundation endeavors for over 27 years! Currently, all the furniture and shelves are in place. It looks great, with tons of donated books in piles all over the floor while things get "cataloged" and shelved.

Got the basic site working, I need to be able to implement different types of incentives/discounts/extra charges.

Concept 1:

Charge standard price while checkout total is less than $150 (example).
If checkout total is more than $150 (say $250) then a discount is calculated as a percent of the difference (say 30%).
In this instance, Product value is $250, discount is $30, Discounted price is $220.
A registered user only to be able to see discount at the checkout screen.

Where would I need to modify the code to implement above?

Concept 2:

Is anyone thinking about or working on an improved ajax checkout? The goal would be combining checkout screens, logintoboggan login/registration, and payment into a one- or two-screen form wizard with in-place editing of user-entered data. So users don't feel the burden of creating an account and navigating a form obstacle course.

It seems theoretically possible using some javascript libraries, form_alter, etc.

We'd like to work on this for the 4.7 version of goodstorm and are looking for developers and any sites which would be interested in co-sponsoring development.