A manufacturer of jeans is interested in developing an advertisement campaign that will reach four different groups. Advertisement campaigns can be conducted through TV, radio and magazines. The following table gives the estimated cost in paise per exposure for each group according to the medium employed. In addition, maximum exposure levels possible in each of the medium, namely TV, radio and Magazines are 40, 30 and 20 million, respectively. Also, the minimum desired exposures within each group, namely 13-18, 19-25, 26-35, 35 and older, are 30, 25, 15 and 10 millions. The objective is to minimize cost of obtaining the desired minimum exposure level in each age group. Formulate this as a transportation problem and find the optimal solution. Medium Age Group 13-18 19-25 25-35 35 and above TV 12 7 10 10 Radio 10 9 12 10 Magazines 14 12 9 12