In the unbalanced transportation problem in Table 5.36, if a unit from a source is not shipped out (to any of the destinations), a storage cost is incurred at the rate of $5, $4, and $3 per unit for sources 1, 2, and 3, respectively. Additionally, all the supply at source 2 must be shipped out completely to make room for a new product. Use Vogel's starting solution, and determine all the iterations leading to the optimum shipping schedule. TABLE 5.36 Data for Problem 5-26 $1 $3 $2 $2 $4 $3 $1 $5 $3 20 40 30 30 20 20