To do a multiple add to cart from a results page you would:
1) create the results page that looks the way you want
2) wrap it in a form and add the quantity fields, name them with the productID so that you can match them up when adding to the cart
3) Use "add to cart from recordset" and refer to the quantity fields matched up by productID
The display manager in ecart will allow you to add a "Quick Cart" design similar to the one you have in the screen shot. You can adjust it further or copy and paste from it to customize to your own needs.