Question: Consider the transportation model in the file Williamson, which is very similar to the Foster Generators model discussed in the chapter. Williamson produces a single product and has plants in Atlanta, Lexington, Chicago, and Salt Lake City and warehouses in Portland, St. Paul, Las Vegas, Tuscon, and Cleveland. Each plant has a capacity, and each warehouse has a demand. Williamson would like to find a low-cost shipping plan. Mr. Williamson has reviewed the results and notices right away that the total cost is way out of line. Use the Formula Auditing Tools under the FORMULAS tab in Excel to find any errors in this model. Correct the errors.