Was just wondering if my calculations are correct, furthermore, what do i need to consider to calculate the one's i have not yet done? as being a service industry it is a bit more challenging

Additional info

Intangible assets constitute goodwill relating to an international airline business acquired 5 years ago, mainly services south east asia and china

PPE consists primarily of aircraft, aircraft engines, and aircraft parts

Revenue recieved in advance relates to customer prepaid flights

Aircraft are leased from third parties