solve this example by hand and step by step by using transportation model

Example: Seers Inc. has two manufacturing plants at Albany and Little Rock that supply Canmore brand refrigerators to four distribution centers in Boston, Philadelphia, Galveston and Raleigh. Due to an increase in the demand for this brand or refrigerators that is exported to last for several years, Sears Inc. has decided to build another plant in Atlanta or Pittsburgh. The unit transportation costs, expected demand at the four distribution centers and the maximum capacity at the Albany and Little Rock plants are given in the following table. Determine which of the two locations, Atlanta o Pittsburgh, is suitable for the new plant Seers Inc. wishes to utilize all of the capacity available at its Albany and Little Rock locations. Costs, demand and supply capacity information