Edit some Javascript in Magento

THIS PROJECT IS URGENT. DO NOT BID UNLESS YOU CAN COMPLETE IN 12 HOURS - We have some script on our success checkout page.(both sections attached) It takes data from the order and posts it to our affiliate network. It is working fine but we need to make it slightly better. We need to make a change to this line: var payoutCodes = ''; WHAT WE NEED. We need to know how much value of the order has products with matching attributes. (this relates to a single attribute) EXAMPLE an order totals £600 There are 6 products on the order of £100 each. Two of those products have the value 'band1' for the attribute 'payoutband' Three of those products have the value 'band2' for the attribute 'payoutband' This should produce the code: var payoutCodes = 'band1,200.00,band2,300.00'; This breaks down to say £200 of the order had products with 'band1' and £300 of the order had products with 'band2' and there was a further £100 not counted in this line of code. PLEASE READ CAREFULLY: Start proposal with 'SCRIPT NINJA' to confirm you have read this. You will get dev site for testing, front end user details etc. You are to test this yourself and will be given all that is needed for testing.... To be completed NOW