If you are working with the CPS campaign and your advertiser is sending you a sale amount in the postback under sale_amount parameter and you need to define the revenue and payout in %.
so the calculation is done like this:
let's say conversion is recorded with sale amount from Advertiser is $10
you have set
Revenue = 60% ,
Payout = 40%
(if you own getting your whole commission in sale_amount then you can set revenue as 100%)
so conversion sale_amount=10
Revenue = 60 % of sale_amount = 60 % of 10 = $6
Payout = 40% of sale_amount = 40 % of 10 = $4
so for conversion whose sale amount is $10 then,
Revenue = $6
So you can vary revenue % based on what you are getting sale_amount and manage payout % of the publisher.