Nathan was appointed as the Chief Executive Officer (CEO) of Gamma Corporation, a publicly-traded company in the energy sector, effective January 1, 2022. For the fiscal year 2023, Gamma Corporation compensated Nathan with the following:

• Base Salary: $2,000,000
• Performance Bonus: $400,000
• Stock Grants: Received 10,000 shares of restricted stock with a fair market value of $80 per share at the time of grant.

Nathan's employment agreement stipulates that his bonus is contingent upon achieving specific company-wide performance objectives. The restricted stock vests over a four-year period, with 25% vesting annually beginning on the grant date.

Calculate the deductible portion of Nathan's compensation on Gamma Corporation's 2023 corporate income tax return.