Equity rules for most of the Broadway League (Disney Theatrical has their own agreement that I have yet to check as well as the NFPs, and I'm assuming you are talking about the commercial arm of Broadway) states that rehearsal and performance salaries are the same. The MINIMUM for actors as of 9/29/2014 was $1,861 not including any extra payments for understudy duty, dance/fight captains, extra performances, and such.
An American in Paris also has a separate rulebook in use for another week, so I'm assuming they will change over when they come to Broadway
For workshops, it depends on the number of days. For 5 days, it is $631/week. For 6 days, it is $757/week.
In regards to readings, I am unsure, but there is a provision for a pre-rehearsal reading to be paid at 2/6th (or just 1/3rd - the 2/6th comes from work days I think) of the minimum. So using the minimum I stated above, it would be about $620 a week. However, I have heard elsewhere that it is way less than that. I have never experienced a reading, so I can not speak to it.
It is also important to note that the agreements between Equity and the Broadway League are set to expire in September, so it will change in about 8 months.
I have attached the link to the agreements below if you want to look up anything specific. I know its a lot of info (The League/Equity rule book is 190 pages long). Hopefully that answers your questions though!
P.S. - I like the picture. I saw it twice while it was in Chicago. Once from the top of the balcony, the second from the middle of the first row (thanks, lottery!)
Equity Rule Books
Updated On: 1/24/15 at 09:19 PM