Help with Figuring out an eBay Financial Return

[ibuysportsephemera]

So I am trying to figure out if my calculations are correct or if eBay is correct?


When I make a sale I track the following (for example)


Purchase Price- $20
Shipping Charged- $5.95
Total Collected- $25.95
Less: eBay FVF- $2.98
Less: Managed Payment Fee- $.30
Total eBay Fees: $3.28
Actual Shipping: $3.95
Net Shipping Plus: $2.00
Total Expenses (Expenses less positive shipping): $1.28
Net to Me: $18.72
Total return ( $20.00 divided by $18.72) = 93.58%


When eBay tracks my sale this is the way they treat it:


Total Sale: $25.95
Less Fees Charged: $3.28
Less Label Cost: $3.95
Net Sale- $18.72
Total Return- ($25.95 divided by $18.72) = 72.1%


My breakdown is much more detailed and I believe the true net should only be on the purchase price without the shipping since I am netting the postage.


I hope this make sense. What do you think I am missing? Is eBay correctly saying my return is only 72% or am I handling this correctly and saying my return is 93%?


Thanks in advance.


Jeff