shopping list type form

I wasn't sure how to name the subject line, but the general idea could relate to a shopping list. (In actuality, it is medically related)
In essence, let's say I am creating a form in which the user may ultimately need to list a number of items that may vary in number. To keep it simple, let's say the person needs to buy multiple items (e.g., a gray shirt, a blue shirt, a green shirt, pants with different colors/sizes, other items with different sizes, colors.)
If I use a drop down list field, I can give that user the option of what to choose. However, I don't want multiple duplicate fields as I can't predict how many different items would be chosen.
Let's say my form has a section for shirts, pants, socks, shoes, sweaters, jackets.
I would like for there to be a single line/drop-down list for these 6 categories. If that user chooses 3 different shirts for that category, the form would have the capability to put the different shirts on 3 different lines when that form is completed/returned. The only way I can see to do this with LCD is to have a separate field for each final choice, but again I don't know how many items will be chosen. I also don't want to just put like 10 duplicate fields in each category with the assumption that the user would not choose more than 10 items per category as this would be an incorrect assumption (could be more) and it would be a clunky form.
Please advise. Am using Acrobat X Pro, LCD2.