Quick Service Restaurants (QSR's) are losing millions of dollars each year due to frequently dropping change in their drive-thru. 
They must re-issue to the customer, the amount that has fallen.

QSR's are spending a lot of time once a dropped change mishap occurs, having the customer count their change to determine
how much fell, and then computing how much needs to be re-issued.  

QSR's are losing millions of dollars each year in lost productivity, sending their associates outside several times a day to pick up
what money is still left on the ground in the drive-thru.

QSR's are exposing themselves to unnecessary liability from employees' potential slip-and-fall injuries, and also security risks,
by sending associates outside to pick up change in the drive-thru.

QSR's are exposing themselves to unnecessary liability from potential serious injury or death resulting from their customers
attempting to retrieve dropped change in the drive-thru.