If you wanted more hours as you so said you wanted -- you needed to get cashier trained for your role. Guess what dumb ass you got what you exactly signed up for. Now you're being called up left and right due to lack of staff and the practice of relying on side staff for line relief. I'm laughing my aff off because you got exactly what you signed up for dummy. We all went through the same thing and now you are getting a reality taste of what it is like to stock and be a cashier at the same time. You can't worm your self out of this one and say "I don't want to." The only thing that disables you from cashier training is meat/seafood or having an injury disabling you from the role. You're stuck like it or not.