Tweaks to SimpleCart JS

I have a shopping cart website that uses SimpleCart JS ([login to view URL]) and I would like some slight changes made to the code: 1. When the user clicks the 'Buy Now' button, it shows a quantity box. When the quantity box is changed, I want it to submit the new quantity to the cart. So if I had previously added 1 item, and change the quantity to 2, I want it the cart to be 2 items and not 3 items. 2. I want the cart table to be responsive and be similar to [login to view URL] ([login to view URL]), not [login to view URL], which is what SimpleCart gives. Please include the words TWO THINGS at the start of your response so I know you have read and understood my requirements. Responses without these words will be IGNORED. This is a simple job and I have most of the items complete. SO only these TWO need to be completed.