How can I link Marketpress to Quickbooks for credit card processing and inventory tracking

I have a client that wants to use marketpress to sell products online but they want it to tie into their current system that utilizes QuickBooks and Intuit.

1. It there a way to link the credit card processing to the Intuit system? Maybe a 3rd party processing like Stripe?

2. Is there a way to link the inventory in Quickbooks to the online store inventory? This company has 2 store locations and a warehouse so they want to try and keep the current tracking system they have.

Thanks in advance for the help,