No, you will book it under one rate or the other. In order to get the cast discount, you must book through the cast line and check in with them and be staying in the room. No other discount can be applied. For the Florida Resident rate proof of residency is required and again, they will not allow it to be combined with another discount. When ordering tickets, to get your discount you must buy them backstage from Company D. They are already discounted so not other discount will apply. If they are getting the Florida Resident rate, again, proof of residency is required and they can buy them from anywhere you would get tickets.
Also, your cast member discount is just for you. That means any time it is used you have to be on the receiving end. So if you get tickets, you either have to pay cash or with a card with your name on it. If you use it for a hotel you have to be physically staying in the room. For merchandise, the money must come from you. They can't even hand you the cash in the store. The only exception is food. Somebody else can pay but you still have to be eating there and your meal has to be on the bill. Violations of this can be cause for termination.