That must include the guided tour and tram ride, huh? If so, that's a very good price.
Check out costco if you're a member, think they give a 20% discount.
If you're going to both the zoo and the wild animal park, you may look at getting a membership. I think it's a little less than the full price of admission for one day to both parks, but you can get unlimited admission to both parks for one year (you live in SoCal, so you could use that again), and it's tax deductible (dunno if that's something you could use or not).