If Airsonics purchases the helicopter, before tax operating cost will be $200,000 per year, payable at the beginning of each year. After 6 years helicopter will be worth either $400,000 or $600,000. Probability that it will worth $600,000 is 3 times as much as that it will worth $400,000. There is 30% chance that after two years contract will not be renewed. In that case helicopter will be sold at a short notice for $1,000,000. Assume asset pool will remain open. Calculate tax