Regardless of the math, it takes some big brass ones (and not in a good way...) to come onto his thread like this and talk trash.
It seems to me that you ought to just stick to running your own program, let Charlie run his program as he sees fit and let the racers decide how the numbers work out for themselves.
I'm pretty sure we're all capable of doing basic math and deciding where we want to spend our money. Frankly, entry fees aren't very high on my "where am I going to race?" list.
At least that's my $.02 per racer.