Possible to store data, add up totals then display?

[jjacob_1]

I'm using xpath to build a report which I'm sure is easier with SQL but for the sake of not having to redesign the whole report from scratch, is it possible to retrieve $F{descrption}, store it into an array or hash or something similar in ireport, then after processing all of the fields, then printing out the totals?

Here is an example, say you have the following listed descrptions (the numbers are amount):

2 Laptop

1 Laptop

3 Cables

4 Monitors

When it goes through this list I would like it to print out:

3 Laptop

3 Cables

4 Monitors

By perhaps taking list one, storing it into an array/hash and then retreving the list for use later?

 

Sorry if it's not explained well, its early. Lemme know if I need to try and explain it better.