For a telephone survey, a marketing research group needs to contact at least 150 wives, 120 husbands, 100 single adult males, and 110 single adult females. It costs $2 to make a daytime call and $5 to make an evening call. Table below shows the results that can be expected. Because of limited staff, at most half of all phone calls can be evening calls. Determine how to minimize the cost of completing the survey on worksheet Q6. Percentages Daytime Evening Wife 30% 30% Husband 10% 30% Single male 10% 15% Single female 10% 20%