Who's on First?

Yesterday's post inspired me: old sketches are still funny!

Today, Abbott and Costello perform the classic "Who's on first?" baseball sketch in their 1945 film "The Naughty Nineties" first performed as part of their stage act. This is one of the funniest sketches of all time, and may be the most famous of all.

As long as we have Abbott & Costello on our mind, here's their math: