I work at a produce supply company and was hired for the office. My job description when I was hired was just filing paperwork and taking calls. Generally people call pretty often, though we have busier hours than others, and being away from the desk for any amount of time makes us miss calls and puts us behind on paperwork.Today they told us that our coworker is now a supervisor and that he will be delegating extra physical tasks to us, like weighing food, stocking shelves, cleaning the shop etc. Before this, he had tried to make me do these sort of tasks which I would respond with “I don't get paid to do that” or “that's not my job”. They're not giving us any extra pay for these duties or any choice, and just act like we should be OK with it. I don't want to quit, because they accommodate my hours and it's a pretty nice job otherwise, but I don't think it's fair to make us do warehouse work as well as office work, especially without compensation. Advice/thoughts appreciated?