They might “burst” $6 per second for short periods, but $1600 every five minutes? I don’t think so.
And those figures are total gross sales; your original assertion was “$20,000 PROFIT per hour”.
I think your friend is misinformed.
He cannot be “misinformed,” he is responsible for all of it, and is one of the three guys that have to put their key in the slot for the armored car courrier to get the bags.