Exactly!  I used to recycle by making bags of exactly 100 plastic bottles, meaning each bag should be $5.00.  I would take six bags, supposedly $30, get them weighed and receive only $25.  Now, I know we're only talking loose change, but either the scale was off, or they purposely shortchanged a lot of people, especially those who would bring in truckloads.  We paid the extra $.06 per bottle at the register!