//Dustin Einglett
//Problem to calculate fees owed for amount of registered attendees

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

int main()
{

	//variables
	const float UP_TO_FIVE_REGISTERED = 125;
	const float SIX_TO_TWENTY_REGISTERED = 100;
	const float TWENTY_ONE_PLUS_REGISTERED = 75;
	float registered;
	double feeOwed;

	//input
	cout << "How many are registered to attend?";
	cin >> registered;

	cout << "\n\n\nDustin Einglett\n\n\n";

	//math
	if (registered <= 0)
	{
		cout << registered << " is not a valid number of attendees";
	}
	else
	{
		if (registered < 5)
		{
			feeOwed = registered * UP_TO_FIVE_REGISTERED;
		}//if<5
		else
		{
			if (registered <= 20)
			{
				feeOwed = registered * SIX_TO_TWENTY_REGISTERED;
			}//if<20
			else
			{
				feeOwed = registered * TWENTY_ONE_PLUS_REGISTERED;
			{//registered>20
		//output
		cout << "Attendees registered is: " << registered << endl;
		cout << fixed << setprecision(2);
		cout << "Fee owed: $" << feeOwed;
		}
	}

}//main