Info

Radio

Television

Cost per ad

$ 6,000

$10,000

Total audience per ad

10,000

20,000

Audience per ad with income >$50,000

10,000

10,000

Unmarried audience per ad

8,000

10,000R + 20,000TV - SA = 100,000 10,000R + 10,0007V - Sj = 80,000 8,000R + 4,0007V - SS = 40,000

SA, SI, and SS are slack variables indicating the extent to which minimums on total audience exposure, exposure to individuals with incomes of at least $50,000, and exposure to single individuals, respectively, have been exceeded. Note that each slack variable is subtracted from the relevant constraint equation because greater-than-or-equal-to inequalities are involved. Excess capacity or nonzero slack variables for any of the constraints mean that audience exposure minimums have been exceeded.

The solution to this linear programming problem is easily obtained using a combination of graphic and analytical methods. Figure 9.10 illustrates this solution. The feasible space problem

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