# Rucklehouse Public Relations has been contracted to do a survey following an election primary in New Hampshire.

## Question:

At least 3,000 interviews must be conducted.

At least 1,000 interviews must be by telephone.

At least 800 interviews must be personal.

An interviewer conducts only one type of interview each day. The cost is $50 per day for a telephone interviewer and $70 per day for a personal interviewer. The firm wants to know the minimum number of interviewers to hire in order to minimize the total cost of the survey.

Formulate a linear programming model for this problem.

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