An employee of a public Canadian corporation receives an option to purchase 1,000 of her employer's common shares at $22 per share in July of the current year. At this time the fair market value of the stock is $20 per share. In September, when the fair market value is $28 per share, she exercises the option to purchase 1,000 shares. In December, she sells the shares when the fair market value is $30 per share. By what amount do these transactions increase her employment income, and when is the employment income inclusion recognized?