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Question
NARRBEGIN: SA_76_82A marketing research professor is conducting a telephone survey and needs to contact at least 160 wives, 140 husbands, 110 single adult males, and 120 single adult females. It costs $2 to make a daytime call and $4 (because of higher labor costs) to make an evening call. The table shown below lists the expected results. For example, 10% of all daytime calls are answered by a single male, and 15% of all evening calls are answered by a single female. Because of a limited staff, at most half of all phone calls can be evening calls. Determine how to minimize the cost of completing the survey.
| Percentages | Daytime | Evening |
| Wife | 25% | 25% |
| Husband | 15% | 30% |
| Single male | 10% | 25% |
| Single female | 15% | 15% |
| None | 35% | 5% |
What are the decision variables in this problem?
Answer
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