Hat is worked sideways

Yarn for model:
Caron® Simply Soft™ (Solids: 6 oz/170.1 g; 315 yds/288 m; Heathers: 5 oz/141.7 g;
250 yds/228 m)
Contrast A Charcoal Heather (H9508) 1 ball
Contrast B Cool Green (39770) 1 ball
Contrast C Chartreuse (39771) 1 ball