im looking a part b. im getting M = 238 but its saying that is wrong. can someone solve for b?

A larger and more modern main post office is to be constructed at a new location in Davis, California. Growing suburbs caused a shift in the population density from where it was 40 years ago, when the current facility was built. Annette Werk, the postmaster, asked her assistants to draw a grid map of the seven points where mail is picked up and delivered in bulk. The coordinates and trips per day to and from the seven mail source points and the current main post office, M, are shown in the following table. M will continue to act as a mail source point after relocation. a. Calculate the center of gravity as a possible location for the new facility. (Enter your responses rounded to the nearest whole number.) The center of gravity " X " coordinate =12. The center of gravity " Y " coordinate = b. Compare the load-distance scores for the location in part (a) and the current location, using rectilinear distance. (Round all intermediate calculations to the nearest whole number.) The load-distance score to " M " is (Enter your response as an integer.)