We get 30% of the sales price for cart sales.
The "list" (i.e., regular) cart price of a Low-res clip is $19 (or at least it was, the last time I looked). 30% of $19 is $5.70, so that's the most we ever get for a Low-res cart sale. Some buyers pay less, so sometimes we get less. I think $3 is the lowest I've had.