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​The Westchester Chamber of Commerce periodically sponsors public service seminars and programs.

The Westchester Chamber of Commerce periodically sponsors public service seminars and programs. Currently, promotional plans are under way for this year's program. Advertising alternatives include television, radio, and online. Audience estimates, costs, and maximum media usage limitations are as shown: 


ConstraintTelevisionRadioOnline
Audience per advertisement150,00017,00035,000
Cost per advertisement$1,500$250$500
Maximum media usage121811


To ensure a balanced use of advertising media, radio advertisements must not exceed 45% of the total number of advertisements authorized. In addition, television should account for at least 10% of the Television Radio Online $1,500 $250 $500 18 total number of advertisements authorized 

(a) If the promotional budget is limited to $24,000, how many commercial messages should be run on each medium to maximize total audience contact? If your answer is zero enter "0" 

What is the allocation of the budget among the three media?

What is the total audience reached? 

(b) By how much would audience contact increase if an extra $100 were allocated to the promotional budget? Round your answer to the nearest whole number.

Solutions

Expert Solution

Answer report

Objective Cell (Max)
Cell Name Original Value Final Value
$F$4 Audience 0 2218736.8
Variable Cells
Cell Name Original Value Final Value Integer
$C$3 Television 0 12.00 Contin
$D$3 Radio 0 2.53 Contin
$E$3 Online 0 10.74 Contin
Constraints
Cell Name Cell Value Formula Status Slack
$F$6 Budget 24000 $F$6<=$H$6 Binding 0
$F$7 Max Radio -8.842105263 $F$7<=$H$7 Not Binding 8.842105263
$F$8 Min TV 6.66134E-16 $F$8<=$H$8 Binding 0
$C$3 Television 12 $C$3<=$C$9 Binding 0
$D$3 Radio 2.526315789 $D$3<=$D$9 Not Binding 15.47368421
$E$3 Online 10.73684211 $E$3<=$E$9 Not Binding 0.263157895

(a)

Television - 12 messages
Radio - 2.53 messages
Online - 10.74 messages

Television budget - $18,000
Radio budget - $631.58
Online budget - $5,368.42

Total audience reached = 2218736.8

(b)

Sensitivity report

Variable Cells
Final Reduced Objective Allowable Allowable
Cell Name Value Cost Coefficient Increase Decrease
$C$3 Television 12 45105.26316 150000 1E+30 45105.26316
$D$3 Radio 2.526315789 0 17000 500 332000
$E$3 Online 10.73684211 0 35000 15581.81818 1000
Constraints
Final Shadow Constraint Allowable Allowable
Cell Name Value Price R.H. Side Increase Decrease
$F$6 Budget 24000 69.89473684 24000 138.8888889 5666.666667
$F$7 Max Radio -8.842105263 0 0 1E+30 8.842105263
$F$8 Min TV 6.66134E-16 526.3157895 0 0.5 10.83870968

Note the shadow price of the budget constraint.

So,

an addition $100 budget will get 69.89 * 100 = 6,989 more audience


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