Tim mows neighborhood lawns for extra money. Suppose that he would be willing to mow one lawn for ​$12​, a second lawn for ​$15​, and a third lawn for ​$23. Also suppose that three neighbors are interested in having their lawns mowed. Mrs. Jones would be willing to pay ​$30 to have her lawn​ mowed, Mr. Wilson would be willing to pay ​$26​, and Ms. Smith would be willing to pay ​$23.
Considering Mrs.​ Jones, Mr.​ Wilson, and Ms. Smith​ together, what will be their consumer​ surplus?  ​