Extend the Gravity Forms Entry-List

I need some extensions to the Gravity Forms Entry-List. I have a form with the fields - item_id - order_id - date - product - options - quantity - measurement I need the possibility to display the entries from this form grouped and summed. - i need a new button at the Toolbar "Grouped By" with Submenu's "Order, Date, Product, Product with option". - if the user selects one of the submenu the entries of the current form will be grouped and summed by order, date, product or product with option - for every group the list will display a subamount - at then end i need a total amount I need a second menu at the toolbar "PDF Export" with the same submenues that will send a PDF-File grouped and summed as described below to the wordpress admin. The filter of the list must be used. You have to work on your own sever. Attached you'll find a PDF with an example of how the grouping must work. This is only an example. There are more than this products and options with different measurements.