Longest Code yet.

/*
    MSP v1.0
    Created by Julio Milian
    July 17. 2016

    Program will calculate the amount due
    after a month of cellular usage.
*/

#include <iostream>
#include <iomanip>
using namespace std;

int main() {

    double aPrice = 39.99;
    double bPrice = 59.99;
    double cPrice = 69.99;
    double mins = 0.0;
    double aMins = 0.0;
    double bMins = 0.0;
    double total = 0.0;
    double atotal = 0.0;
    double btotal = 0.0;
    char input;

    cout << "Which monthly package do you currently have? ";
    cin >> input;
    cout << "How many minutes did you use within the month? ";
    cin >> mins;
    // switch case start -------------------------------------------------------------------------
    switch (input)
    {
    case 'A':
    case 'a':
        cout << "\nYou have chosen plan A!\n";
        total = total + aPrice;
        cout << "\nMonthly charge is $" << total << endl;
        aMins = 450 - mins;

        if (aMins > 0)
            cout << "You still had minutes left over in the month!" << endl;
        else {
            aMins = aMins * -1;
            aMins = aMins * 0.45;
            total = total + aMins;
        }
        cout << "Your total due balance for this month is $" << total << "\n\n";

        //check if plan b is cheaper
        btotal = bPrice;
        mins = 900 - mins;
        if (mins < 0) {
            mins = mins * -1;
            mins = mins * 0.40;
            btotal = btotal + mins;
        }

        if (btotal < total && btotal < cPrice) {
            cout << "Plan B would have been cheaper for the amount of minutes you used.\n";
            cout << "The total using plan B would have been $" << btotal << endl;
            btotal = total - btotal;
            cout << "You would have saved $" << btotal << "\n\n";
        }
        else
            if (btotal > cPrice) {
                cout << "Plan C would have been cheaper!\n";
                total = btotal - total;
                total = total * -1;
                cout << "You would have saved $" << total << endl;
                cout << "Your monthly charge would have been $" << cPrice << endl;
            }
            else
                cout << "Plan A is the cheapest with the minutes you used!\n";
        break;

    //CASE B - PLAN B --------------------------------------------------------------------------

    case 'B':
    case 'b':
        aMins = mins;
        cout << "You have chosen plan B!\n";
        total = total + bPrice;
        cout << "\nMonthly charge is " << total << endl;
        mins = 900 - mins;
        if (mins > 0)
            cout << "You still had minutes left over in the month!" << endl;
        else {
            mins = mins * -1;
            mins = mins * 0.40;
            total = total + mins;
        }
        cout << "Your total due balance for this month is " << total << endl;

        //check if plan a is cheaper
        atotal = aPrice;
        aMins = 450 - aMins;
        if (aMins < 0) {
            aMins = aMins * -0.45;
            atotal = atotal + aMins;
        }
        if (atotal < total && atotal < cPrice) {
            cout << "\nPlan A would have been cheaper this month!\n";
            atotal = total - atotal;
            cout << "It would have saved you $" << atotal << endl;
            cout << "Your total for Plan A would have been $" << atotal << endl;
        }

        //check if plan c is cheaper
        if (total > cPrice){
            cout << "\nPlan C would have been cheaper!\n";
            cPrice = total - cPrice;
            cout << "You would have saved $" << cPrice << endl;
        }
        break;

        //CASE C - PLAN C --------------------------------------------------------------------------

    case 'C':
    case 'c':
        total = cPrice;
        cout << "\nMonthly charge is " << total << endl;
        cout << "Your total due balance for this month is " << total << endl;
        //check if plan a is cheaper
        if (mins <= 494) {
            aMins = 450 - mins;
            aMins = aMins * -0.45;
            atotal = 49.99 + aMins;
            atotal = total - atotal;
            cout << "\nPlan A would have been cheaper.\n";
            cout << "You would have saved $" << atotal << endl;
        }
        //check if plan b was cheaper
        if (mins <= 924) {
            bMins = 900 - mins;
            bMins = bMins * -0.4;
            btotal = 59.99 + bMins;
            btotal = total - btotal;
            cout << "\nPlan B would have been cheaper.\n";
            cout << "You would have saved $" << btotal << endl;
        }
        break;
    default:
        cout << "\nPlease select A, B, or C.\n\n";
        break;
    }//end switch
    return 0;
}//end main