Commerce and Creating a Fundraiser and Showing Profit

Site URL: https://www.dutchmillbulbs.com

I'm getting ready to start a commerce site. This site will have a wholesale section for general buyers and then will have separate fundraiser pages specific to individual groups. These groups earn money from the seller when people use their link to make purchases. The client wants the site to track this.

This is a comment from my client ... "...the most important thing, and this is VERY important, is that each group who has a link or URL for their fundraiser can tell exactly how much profit they earned during their fundraiser.  I issue profit checks for 50% of profit at the end of their sale and it doesn't have to be anything like the current site... just accurate for each group!" 

I've been searching through the SquareSpace help topics but don't really see anything that fits this request. 

Advice anyone?