[=Nico_4;234723]
per quarter, did you mean like ?
Q1 $3700x5%
Q2 $2800x5%
Q3 $1200x5%
oh, i think i should re-read eula… i’m confused now
[/]
It’s not that bad. 
The royalty is on earnings beyond $3000 per product per quarter. So:
Q1 $3700 - $3000 = $700 x 5% = $35
Q2 $2800 is under $3000 and = $0
Q3 $1200 is under $3000 and = $0