2:9-13 Finnish Furniture manufactures tables in facilities located in three cities-Reno, Denver, and Pitts- burgh. The tables are then shipped to three retail stores located in Phoenix, Cleveland, and Chicago. Management wishes to develop a distribution sched- ule that will meet the stores' demands at the lowest possible cost. The shipping cost per unit from each of the sources to each of the destinations is shown in the following table: TO FROM PHOENIX CLEVELAND CHICAGO RENO 10 16 19 DENVER 12 14 13 PITTSBURGH 18 12 12 The available supplies are 120 units from Reno, 200 from Denver, and 160 from Pittsburgh. Phoenix has a demand of 140 units, Cleveland has a demand of 160 units, and Chicago has a demand of 180 units