What costs would be involved in adding a one page checkout to: [url removed, login to view] . I need it to work with my merchant account with quickbooks merchant center, coupon module, and shipping modules with estimator. I also want it to have the same look and feel as the rest of the site such as the colors, header, footer and nav bar.
I also need the updated USPS module installed for usps rates.
When guests checkout they cannot change their shipping address. That would also need fixed.
Please let me know how much this all would cost to have done.
[url removed, login to view]
npw@[url removed, login to view]