Thank your for your reply. I have 3 more good suggestions.
1. There should be a way to change the state of ADD TO FAVORITE BUTTON when an item is selected in the cart. ie. When an item is picked from the list or from page it's(button) state should change to ITEM SELECTED or a custom word.
2. There is a need for a SHORTCODE for total number of item picked from the list.
3. If you can, you can change this plugin for other purpose also. I mean not only for shopping cart but also for an item list picker and selected item reported. For this purpose there should be a way to customize the checkout page. I mean, there should be an option to hide pay pal button, item named heading, quantity heading and price. You can add one or fields for other details. Example if the plugin in using for hotel menu item picking The heading will be Menu item - item description - and item category.
My suggestion No 3, may make you little confusion. But a detailed explanation will be provided if interested.
Thank you once again for your great plugin. Hope that you will make it Ajaxify and my above 2 suggestion will be considered.