Forms :: How To Add Listbox Contents To A Subform

I have five list boxes set to a table in my database. Here is what a few rows in my table look like...

ID IngredientName IngredientType Cost
1 Ham Meat $1.23
2 Beef Meat $3.45
...... ....
27 Lettuce Vegetable $0.22
28 Onion Vegetable $0.12
..... ....
38 Mayonaise Sauce $0.13

The five listbox controls each show the list by the IngredientType, so one listbox shows vegetables, another Meat, and so on. Multi-select is turned on for each listbox. Here is what I want to do: In the form I want to have a subform that will show what the user clicks in listboxes. This running list, with an extra column next to it that will accept a number. Example: say the user selects 'Ham' from the meat listbox. The subform should then show 'Ham' and a space next to it where he can type an integer (allowing for more meat).

Subform:

Ham | 2
Lettuce | 1
Mayo | 1
Subroll | 1

If the user de-selects the item in the listbox I'd like the subform to delete the item from itself.