How much money does the man need?

Man Do you have any cash on you by any chance?
Woman Well, yes, I went to the bank this afternoon, but I only have about forty dollars.
Man Great. That’s plenty. Could you lend me fifteen until tomorrow? I’m in a rush to get to a meeting, and I need some cash to pay for a taxi.
Woman Well, all right, but promise you’ll pay me back tomorrow, not next week or the week after.