Zcesh Calculator?

Joining the questions. I feel pretty clueless.
According to this post, it’s a lottery ticket chances.
I’m trying to evaluate the chance/revenue of the NiceHash lottery ticket:

~$50 (at the time of writing) = 100 Sol/s, out of current 756k Sol/s on the network (as I’ve seen on another post. I don’t know yet how to confirm). Thats’s the chacnce of getting the reward on your own.

What’s the chance when you join a pool? What’s the reword.

Multiply all those, with current ~20BTC/ZEC value - and that’s the lottery ticjet.

Can someone please help with the calculations?
Thanks.