You had a good point, but why did you fudge the numbers? First of all in your theater cost everyone got $10 of food, in the at home cost you don't include the cost of food, only the rental. If you're going to make a comparison, compare equal things. So maybe at home it costs $2 for soda, $1 for popcorn and $1.25 for the rental. That's actually $4.25 (that puts popcorn and pop at under $1 per person as you said) compared to maybe more realistically $60 at the theater, assuming a family pack of soda and popcorn and maybe a discount on one of the kid's tickets. I don't go to the theater because of the high costs, and I'm Dutch, so correct me on the numbers if I'm a little off, but I doubt it's $40 for soda and popcorn for a family of 4, maybe $25. Also, popcorn and soda isn't free at home either.
I like your point, it's a good point theaters are overpriced I agree, but I hate it when people exaggerate and fudge numbers to try to prove their point. I hate it even more, and it's a pet peeve, when it's a good point! I glad you actually included the cost of your home theater system into the numbers, most people would have left that out, and seeing the other comments people already have.