Program isn't calculating totals correctly?

[Carlye22]

Hello, for my CSC100AB class, we are writing programs that calculate the total tuition given different variables. I compiled the program with no errors, but the total tuition calculations are all wrong. Thank you for any help!

 #include <iostream>
#include <iomanip>

using namespace std;

void main ()
{
//CONSTANTS

const double major_c = 25;
const double major_o = 35;
const double major_a = 0;

const double registration_fee = 15;
const double in_state = 0;
const double out_state = 0.20;

const double full_time = 950;
const double credit_rate = 95;

//INPUT VARIABLES
double credit_hours;
char living_status;
char major_code;

//CALCULATION VARIABLES
double credit_hr_charge;
double lab_fee;
double living_fee;

//OUTPUT VARIABLE
double tuition_total;

cout << "Enter credit hours: ";
cin >> credit_hours;

cout << "Enter major ('C' - Computer Science, 'O'  - Other Lab Sciences or 'A' for any other major):";
cin >> major_code;

cout << "Enter living status ('1' - In-state or '2' - Out of State)";
cin >> living_status;

if ( credit_hours < 12)
{
	credit_hr_charge = credit_hours * credit_rate;
}

else
{
	credit_hr_charge = full_time;
}


if (major_code == 'C' || major_code == 'c')
{
	lab_fee = major_c;
}
else if (major_code == 'O' || major_code == 'o')
{
	lab_fee = major_o;
}
else
{
	lab_fee = major_a;
}


if (living_status == '2')
{
	living_fee = out_state;
}
else
{
	living_fee = in_state;
}

//CALCULATIONS

tuition_total = credit_hr_charge * living_fee + lab_fee + registration_fee;

cout<< "Total Tuition Cost: $" << tuition_total;
system ( "pause" );
}

[Chervil]

Did you really intend to multiply credit_hr_charge by living_fee?

[Carlye22]

Students are charged 20% of the base tuition price if they live out of state... I changed it to:

//CALCULATIONS
o_charge = credit_hr_charge * living_fee
tuition_total = credit_hr_charge + o_charge + lab_fee + registration_fee;

cout<< "Total Tuition Cost: $" << tuition_total;
system ( "pause" );
}

but the calculations are still wrong..