How do I put number elements of a listbox into an array for further manipulation

Hi.
I'm a noob here and need some help with my project. I am trying to build a GUI whereby the user can input into a 2 column list box the name of an appliance in the first column and the power rating in the second. I want to be able to use all the values in the second colum of the list box (power rating of each appliance) and put them into array where i can then perform power usage calculations etc.
Any help would be mostly appreciated.
Cheers

Thanks for that I got it working.
I got new questions.
You've shown me how to do it which is great but I don't know what is going on. When we create a property node what is it that we are doing exactly?
What I'm trying to do now is add the elements of the 2nd column of the list together. I've enclosed everything around a for loop. Using a constant value 1 connected to the column input of index array and the iteration counter "i" of the for loop as the input to the row connection of index array, I'm trying to get it working so that the for loop only iterates as many rows there are with data .
Attachments:
list to array.vi ‏9 KB

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data = new String[numLines][];I think you want to do this..
data = new String[numLines][3];anyway that's why it's blowing up on the line
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