in which case your entitlement is Award plus (from memory) around 23% as compensation for loss of sick, annual and long service leave. As a casual employee, you are also entitled to a minimum number of hours "call out" - check the Award.
For casual employees, it is 1/800 of the annual salary per hour, plus 25%, with a minimum payment of two to four hours, depending on the tour of duty.*
As I have just posted on another thread, the award is a minimum (safety net award), not something to aim for!
*
Source: AFAP website GA pilots award dated 30/10/2008.