He(?) gets cranky when you point out his math and comprehension shortfalls.
I noticed, the funny part is I fully expected a similar response. It's sort of a universal formula on FR, anyone that starts by saying you're lying, then lies themselves and insults you is sure to complain that you're mean in their next post. It's so predictable I almost think that breed of poster are actually web-bots, it's not their fault they're just coded wrong.