Hmm, interesting. The only reason I am not including her as a co-signer is that I'm making enough to be a sponsor myself. Sure I can write a couple lines explaining this.
Regarding the annual gross income, now it confuses me even more. The job offer that I received was stating my salary and other benefits like stock options. Price of the stock option was changing all the time. Moreover, the salary number was valid for less than a year, then I got an increase each year. So what is the annual gross income in this case? In addition to this, I quit that job and started in another company in the middle of a year. As I understood it, I had to count all the money that company gave me from the first day to the last day, so I added employment income from all my T4's from both companies.
Thank you for your replies.