#include <iostream>
using namespace std;

void PrintProgramDescription()
{
	// 80-column terminal:
	//      "----1----2----3----4----5----6----7----8----9----0----1----2-
	//      "---3----4----5----6"
	cout << "This program will calculate commission based on total sales d"
	     << "ollars given from\n"
	     << "user input.\n"
	     << endl;
}

float GetSalesDollars()
{
	float sales;

	cout << "Enter total sales dollars: ";
	cin  >> sales;

	return sales;
}

float CalculateCommission(float sales = GetSalesDollars())
{
	float commission;
	
	if (sales < 250)
		commission = (sales * 1.00);
	else if (sales < 499)
		commission = (sales * 1.05);
	else if (sales < 1000)
		commission = (sales * 1.075);
	else commission = (sales * 1.10); 

	return commission;
}

void PrintResults(float commission = CalculateCommission())
{
	cout << commission << endl;
}

int main()
{
	PrintProgramDescription();
	//GetSalesDollars();
	CalculateCommission(GetSalesDollars());
	PrintResults();

	return 0;
}