Asset$|$Capital Gain$/$Loss

Sailboat: $13,000$

Speedboat: $-22,500$

Principal Residence: $145,000$

Vacant Land: $-274,405$

Big Pharma Shares: $-104,000$

PC Shares: $2,371,950\mathrm{.}00$

Gold Ring: $3,300$

West Shares: $64,505\mathrm{.}26$

Principal residence information: : The home was the principal residence for Dr$.$ and his former spouse for $10$ years, ending in the current taxation year. Last$$ year, Dr$.$ sold his cabin at the$$ lake, which he claimed as his principal residence for two taxation years$($the cabin at the lake was designated as Dr$.\text{'}$s principal residence for the two most recent taxation$$ years.$)$ Therefore, this home cannot be claimed as Dr$.\text{'}$s principal residence for those years.

Calculate the net taxable capital gain for Dr$.$ for the current year:

Answer is $$1,044,426\mathrm{.}00$

Please tell me how this answer was reached.