How much does Bernie Taupin make when Elton sings a song live?

[MrFloppy]

Not sure if this is a factual question and not sure if it can even be answered.

I had the opportunity to see Elton John live last evening with Mrs. Floppy and some friends. Thankfully he mostly sang his 70s classics and it got me thinking, how much does his long-time co-writer Bernie Taupin make when EJ sings a song in which Taupin wrote the lyrics?

I say $100 per song but of course this is pure conjecture.

Nice life though eh? Going to the mailbox must be awesome.