"Contingency planning" sometimes involves significant expense.
My take is that their defence will be something along the lines of;
"QF's only legal response was a lockout and, although it was a last resort, we had to put measures in place which enabled such a course of action to be effective with minimum inconvenience to the customers. As per Mr Joyce's testimony the final decision was
not taken until the Saturday morning."
The cost of hotel bookings, couriers, printing etc were a necessary, if dispensable, expense which has been written off against that nasty industrial action by the unions.
Yep, you can call me cynical.