Which is correct English, "you have minus one dollar in your account" or "you have minus one dollars in your account"?
Is the rule general?
For example, which is correct, "you have minus one diamond in your account" or "you have minus one diamonds in your account"?
I note that number-word.calculators.ro gives "minus one dollar", and that of course "you have minus two dollar in your account" is wrong while "you have minus two dollars in your account" is correct. Further "please minus one dollar from my account" is correct, while "please minus one dollars from my account" is not.