Where can I see how many tips I've made so far as a magician?

[swws98]

I've must have performed for tips some 40-50 times by now with my Sim. The achievement should have unlocked already (20k tips). Is there anywhere I can keep track of how much tips I've made so far at least? Or is this (the magic of money) a glitched achievement? I don't understand. I really should have got it by now. My Sim makes about 1k tips per session.

 

Thanks