Unless things have changed since I was involved in scout fundraising (as den leader & cubmaster for boy scouts and troop leader and cookie chairman for girl scouts), that is NOT how it is SUPPOSED to be done.
We had kids who sold enough to go to camp free (a local council incentive) and ones that sold one or two bags of popcorn or boxes of cookies. No one was 'charged' if they didn't sell a certain quota amount.
We certainly had goals that we encouraged them to try for, and incentives if they reached those goals, but which level they attained was an individual or family matter, not a scout requirement.
I would find out who the local cubmaster is and take it up with him/her and if necessary take the matter to the area scout council office, which may be in a nearby city as usually a council includes several counties. This should not be handled this way.