December $31,2020,$ Vaughn Co$.$ performed environmental consulting services for Hayduke Co$.$ Hayduke was short of cash, and Vaughn Co$.$ agreed to accept a $$298,600$ zero interest$-$bearing note due December $31,2022,$ as payment in full Hayduke is somewhat of a credit risk and typically borrows funds at a rate of $10\%$ Vaughn is much more creditworthy and has various lines of credit at $6\%$