Tim mows neighborhood lawns for extra money. Suppose that he would be willing to mow one lawn for ​$12​, a second lawn for ​$16​, and a third lawn for ​$22. Also suppose that three neighbors are interested in having their lawns mowed. Mrs. Jones would be willing to pay ​$35 to have her lawn​ mowed, Mr. Wilson would be willing to pay ​$27​, and Ms. Smith would be willing to pay ​$22.