How does PayPal calculate and assign parallel payment transaction fees? -


my question involves parallel (aka split) payments in paypal's adaptive payments api.

i have been trawling various forums last hour (doesn't www.x.com pages gone), , unable find clear answer seemingly simple question how paypal's fixed transaction fee applied in parallel payment.

i can boil down 2 scenarios, correct: scenario a or scenario b?

many thanks,

ollie

scenario a: buyer pays $100 (buyer not pay transaction fees)

transaction fees receivers split = $100 x 3.4% (variable) + $0.45 (fixed) = $3.85

seller #1 receives $90, less 90% of paypal's transaction fees (90% x $3.85 = $3.47) = $86.53

seller #2 receives $10, less 10% of paypal's transaction fees (10% x $3.85= $0.39) = $9.61

paypal transaction fees total = $3.85

scenario b: buyer pays $100 (buyer not pay transaction fees)

transaction fee receivers split = $100 x 3.4% (variable) = $3.40

seller #1 receives $90, less 90% of paypal's transaction fee (90% x $3.40 = $3.06 + $0.45 (fixed) = $3.51) = $86.49

seller #2 receives $10, less 10% of paypal's transaction fee (10% x $3.40= $0.34 + $0.45 (fixed) = $0.79) = $9.21

paypal transaction fees total = $4.30

if recall correctly, fee calculated scenario , split amongst receivers. test out on sandbox determine method used.