Calculations with GF

I'm currently looking into purchasing GF for a job I'm currently working on but am unsure whether it will suit my needs at this stage. What I need to do is setup a multipage form that an end user will enter how many of each items listed they have and based on that number, multiple it by a preset amount to create a subtotal for that item and then add up all the sub totals for a grand total.

An example would be that I have a list of items (say a desk, chair and a box) and an end user enters that they have 5 desks, 4 chairs and 2 draws. Each of these items need to have stored somewhere the exact cubic metres for those items. It should then be subtotaled per item (5 x cubic meters of 1 desk) and added all together (i.e. total cubic meters per item added together)

Is this something that we can accomplish through gravity forms? I did read when I searched through the forums that in an upcoming release that you were supporting calculations but in the meantime is there anything that I'll be able to do to achieve this with gravity forms?

Thanks

Thanks for that Chris. From what you have said it sounds very much like I can achieve what I need to even though it may take quite a bit of work (large number of items). There is one item I'd like to clarify. For each of those fields I create a quantity field for, is there a way to find out what the variables are called to retrieve that information before submission in that hook you mentioned? (basically so I can do the following: (get number of desks user entered) and multiply by 2.98 cubic meters).

Thanks

Stacey did you end up creating the form ? do you have a link to the form or wold you share the code how you made it ? I'm trying to make exactly that calculator ? greatly appreciate of you could tell me if gravity forms worked for your calculator :) thanks