You are looking at a command called sell

sell
sell {object} to {object}


Sell an object of worth to a trader object.

Use list or inv to find out how much things are worth and how much you can afford to buy and how much your worth will increase when you sell something.

If you have more that one of an objects (eg 3 cats) you can sell a number of them eg sell 2 cats to the baker
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