iDev Affiliate Commission based upon subtotal

[hokkaido]

We've run into an issue with iDevAffiliate and S2Member where since we are in Texas, we have to charge Texas residents sales tax on their online purchases. In our old shopping cart, the sales tax was excluded from the comissionable amount. For example, if $100 product with 8.5% sales tax and 50% affiliate commission, the affiliate payment would be $50 since the subtotal is $100 but the total amount charged to the purchaser is actually $108.50. What's happening currently in the S2 member / idev setup is the total amount is being passed instead of a subtotal amount to idev so it is generating an commission of $54.25 incorrectly instead of $50. I tried asking iDev and below is their response:

"That's actually going to be a question for the S2 guys. The integration is setup on there end. They just need to change the variable being used to send the sale amount to iDevAffiliate to a sub-total amount instead of the grand total."

Is there a switch we can can flip in the S2 setup so it will send the sub-total amount instead of the grand total? Is there a hack available? I've read multiple posts but none seem to address this specific issue.

Thanks in advance for your help.
Sara

[Raam Dev]

Hi Sara,

I'm not sure on this one so I'm going to consult with another support rep and get back to you. Thank you for your patience!

[hokkaido]

Thanks Raam. I also had posted to another topic originally (see link below) and I believe Jason Caldwell was looking into it.

viewtopic.php?f=36&t=2669