Trading and Manufacturing Company owns three factories (A1, A2, A3) and it also has three distribution centers (B1, B2, B3), so if you know that the production capacity of the factories is (1500, 2500, 1000), respectively, and the marketing capacity of the distribution centers is (1800, 1200, 2000). The following table shows the cost /unit for transportation from factories to marketing centers as follows: The required: 1- Preparing the initial transportation schedule according to the three roads Least Expensive.). Test the ideal solution to reach the lowest possible cost