That’s a bit inaccurate I’m afraid, the withhold percent is taken from the item price not from the list price (see what the list price and the item price are here).
Let’s say the list price of an item is $10 and it’s not a Graphicriver item, the author is selling the item exclusively and has sold less than $3,750, and his country doesn’t have tax treaty benefits with the US, his net earnings will be like:
-
Subtract the buyer fee which is 20% from the list price:
10 - (10 * 20%) = 8
that leaves us with the item price -
Subtract the withhold percent from the item price:
8 - (8 * 30%) = 5.6
that’s the author fee and the net earnings -
Calculate the author fee % from the item price, then subtract it from the amount you get at step #2:
5.6 - (8 * 37.5%) = 2.6
, that’s your net earnings (I’m sorry)
For Graphicriver items, it’s the same but instead of taking 20% from the list price as a buyer fee, take the fixed amount of the category where your item is located at (you can find a list for the buyer fee of each category inside the link above)
If you find it complicated to calculate your net earnings, take a look here.
EDIT: Space has beaten me to it as always.