We need a single page shopping cart page. We are currently operating on WordPress 3.5.1 (which I know needs updating).
For now this will be for only one of our products - the product we are selling is very straightforward - it will have two versions (one battery powered, the other AC powered), and possibly 3-4 accessories.
I suppose this could be accomplished through a WP plug in; we use Payeezy Gateway* to process our credit cards.
* - First Data Payeezy Gateway Hosted Payment Pages are compatible with any shopping cart that uses the [login to view URL] SIM payment method.
We'd like this shopping cart to be as invisible as possible within the UI of the site.
Please let me know what you think this would entail.