As a wholly-owned subsidiary of Qantas, the reported 'profit' of Jetstar can just about be whatever Qantas wants it to be. Some resources are shared and other resources are supplied or controlled by Qantas. Qantas only has to have 'control' over equipment/assets (not necessarily ownership) to result in it picking up the lion's share of the depreciation and amortisation. Transfer prices for goods and services between the two can also be manipulated quite easily (and legally).