If you want to inform buyers how much they are losing due to SR commission, then you actually want to get that from the total product price. That's what the buyers see. The original graphs were based on the initial price. I have updated them so you can look it up either way. It's not much different. In my original example, the total price is $216.50, which has a commission of $16.50, while a total price of $200 has a commission closer to $15.50. But hey I'm pedantic.