What was the woman planning to do today?

M: Kate! I thought you were going to leave early today to take your son to the show.
W: I’m still planning to. But I can’t leave until I’ve finished typing all the letters.
M: Can’t you leave that until tomorrow?
W: No, the boss wants them first thing tomorrow morning.
M: How many have you got left?
W: About 5.
M: Why don’t you just go ahead? I’ll do the letters for you.
W: Oh, thank you very much, Jim. You’re so kind.