As the title says, I was given a promotion to "Supervisor" approx. one month ago at my part time job, accompanied by a raise for which I negotiated with the Assistant Manager. Promotion and raise were given at meeting between Assistant Manager, Head Bartender, Floor Supervisor, and myself, during which I was given new responsibilities including mentoring newer staff, I was asked to come into work earlier, etc. I took the minutes for this meeting.
After meeting, Assistant Manager met with each of us individually to negotiate raise with us. He made me an offer, I made a counter