Answered Essay: Design a program to calculate telephone bills if the bills are computed as follows:

Design a program to calculate telephone bills if the bills are computed as follows:

Minimum $7.50 for the first 80 message units

Plus .06/unit for the next 60 units

Plus .05/unit for the next 60 units

Plus .04/unit for any units beyond 200

Design a program to do the following:

An educational institution has employees classified as follows:

Administrative (A)

Faculty (F)

Maintenance (M)

Secretarial (S)

Classified (C)

Part-Time (P)

Each group’s pay is calculated differently. Use IF method and include error routine.

Expert Answer




using namespace std;

int main()


cout<<“Enter the number of message unitsn”;

int units;


// scan number of message units



double bill = 0.0;


// if number of message are less than 80

if(units <= 80)

bill = 7.5;

// if number of message are more than 80 and less than equal to 140

else if(units <= 140)


// calculate bill

bill = 7.5 + ( units  80) * 0.06;


// if number of message are more than 140 and less than equal to 200

else if(units <= 200)


// calculate bill

bill = 7.5 + 60 * 0.06 + (units  140) * 0.05;




// calculate bill

bill = 7.5 + 60 * 0.06 + 60 * 0.05 + (units  200) * 0.04;



cout<<“Bill is : “<<bill;


Samle Output :

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