Our purchase event tracks the total of the transaction not the subtotal. So in other words, it tracks the Product Values + Taxes Collected + Shipping & Handling Costs. This is the best way to track the purchase value, because now your Purchase Conversion Value in your Facebook Ads Manager Reports will show the correct value that you collected. This helps you figure your real ROI for your campaigns, and ad sets when reviewing your ads performance. This is especially helpful if you run Free + Shipping type offers. This is very Powerful.
Regards,
James (Tech Support)
Get Pixel Conversions API on the Shopify App Store
P.S. your 5 star experience is our goal.
Thanks again from all of us here at Pixel Conversion Pro and remember, you are Awesome!