Annual Salary....
Most are calculated on 52 weeks x 5 days x 7.5hrs = 1950hrs
52 x 5 = 260 week days.
Less 20 days leave, 10 sick, 10 public holidays. 40 x 7.5 = 300hrs
Total of 1650hrs worked.
In theory, if you don't use your sick leave, you don't get paid for it.
However, it is factored into your salary.
In theory, many salary workers will clock up 100+hrs of over time, which is more or less unpaid, but often a "bonus" balances that off....
Regarding 260 week days, if you look at a calendar, there is actually 261 week days some years. Yes, on a leap year, you're almost certain to get 261 week days. That is also the case in 2012. But depending on where the weekend falls, you can actually get 261 week days in a normal calendar year.
I've had good health in my working life, and I think unused Sick Days are a much bigger rip off.
But we still live in the lucky country....
Flip side of the coin.... go and move to... India, China, Korea, Russia, The Congo, Iran.... there's worse places to work than Aus !!