E$11-1($Algo$)$ Computing Shares Outstanding $[$LO $11-1]$

The annual report for Commander Cereals disclosed that $1$ billion shares of common stock have been authorized. At the beginning of $2017,795$ million shares had been issued and the number of shares in treasury stock was $108$ million. During $2017,$ the only common share transactions were that $16$ million common shares were reissued from treasury and $27$ million common shares were purchased and held as treasury stock.

Required:

Determine the number of common shares $($a$)$ issued, $($b$)$ in treasury, and $($c$)$ outstanding at the end of $2017.($Enter your answers in millions.$)$