using System;

public class Program

{

    public static void Main()

    {

        //Create variables to store the user inputs

        double dProfessors;

        double dStaff;

        double dStudent;

        double dProfessorMasks;

        double dStudentMasks;

        double dStaffMasks;

        double dProfessorSanatizer;

        double dStudentSanatizer;

        double dStaffSanatizer;

        double dProfessorGloves;

        double dStudentGloves;

        double dStaffGloves;

        int iTotalGloves;

        int iTotalMasks;

        int iTotalSanatizer;

        double dPotentialSavings;

        /*Print a message prompting the user to enter corresponding input. Assign each response to the appropriate variable and convert to a variable type that 

        is usable for precise calculation. Ensure each input is acceptable by testing that its value is non-negative and non-zero - print 

        an error message and terminate execution if the input is invalid.*/

        // introduce the program

        Console.WriteLine("Hello, I am SupplyBot, please answer my questions, and I will calculate how many gloves, masks, and hand sanitizers you need to buy for your professors, staff, and students.\n");

        //ask for number of students, professors, and staff, and verify they are non-negative and non-zero

        Console.WriteLine("Please enter the number of students you are buying for as a whole number.\n");

        dStudent = Convert.ToDouble(Console.ReadLine());

        if (dStudent <= 0)

        {

            Console.WriteLine("\nPlease enter a non-negative and non-zero number!\n");

            return;

        }

        Console.WriteLine("\nPlease enter the number of professors you are buying for as a whole number.\n");

        dProfessors = Convert.ToDouble(Console.ReadLine());

        if (dProfessors <= 0)

        {

            Console.WriteLine("\nPlease enter a non-negative and non-zero number!\n");

            return;

        }

        Console.WriteLine("\nPlease enter the number of staff you are buying for as a whole number.\n");

        dStaff = Convert.ToDouble(Console.ReadLine());

        if (dStaff <= 0)

        {

            Console.WriteLine("\nPlease enter a non-negative and non-zero number!\n");

            return;

        }

    //Calculate the program outputs 

        dProfessorMasks = Math.Ceiling(5.5*dProfessors);

        dStaffMasks = Math.Ceiling(3.5*dStaff);

        dStudentMasks = Math.Ceiling(4.5*dStudent);

        dProfessorSanatizer = Math.Ceiling(1.2*dProfessors);

        dStaffSanatizer = Math.Ceiling(0.8*dStaff);

        dStudentSanatizer = Math.Ceiling(2.1*dStudent);

        dProfessorGloves = Math.Ceiling(3.5*dProfessors);

        dStaffGloves = Math.Ceiling(2.8*dStaff);

        dStudentGloves = Math.Ceiling(2.5*dStudent);

        iTotalGloves = Convert.ToInt32(dProfessorGloves + dStudentGloves + dStaffGloves);

        iTotalSanatizer = Convert.ToInt32(dProfessorSanatizer + dStudentSanatizer + dStaffSanatizer);

        iTotalMasks = Convert.ToInt32(dProfessorMasks + dStudentMasks + dStaffMasks);

        dPotentialSavings = ((dProfessors*100) + (dStaff*80) + (dStudent*150))-((iTotalGloves*6.5)+(iTotalSanatizer*15.5)+(iTotalMasks*8.5))-250;

    //Print the outputs of the calculator.

        Console.WriteLine("\n========================================");

        Console.WriteLine("\nBased your inputs your calculated purchase amounts are:");

        Console.WriteLine("\n"+iTotalMasks +" masks");

        Console.WriteLine("\n"+iTotalSanatizer+" bottles of hand sanatizer");

        Console.WriteLine("\n"+iTotalGloves+" gloves\n");

        Console.WriteLine("========================================");

        Console.WriteLine("\nYour potential savings on this purchase is $"+ dPotentialSavings);

    }

}