//PREPROCESSOR DIRECTIVE
# include <iostream>   //FOR CIN AND COUT
# include <iomanip>
# include <string>
 
using namespace std;
 
//Main Function
 
int main()
 
{
	//Define Variables
	int      Quantity;            //  QUANTITY OF ITEMS
 
	float    Cost;                //  SALES ITEMS
	float	 Discount;          //  DISCOUNT MONEY
	float	 TaxRate;           // SALE TAXES
	float	 TotalCost;	        // TOTAL AMOUNT FOR EACH ITEM
	float	 AdjustAmount;      // THE AMOUNT DUE
 
 //DEFINE CONSTANTS
	const double DiscountRate1= 0.00f;    //Rate CODES
	const double DiscountRate2= 0.20f;
	const double DiscountRate3 = 0.30f;
	const double DiscountRate4 = 0.40f;
	const double DiscountRate5 = 0.50f;
 
	cout.setf(ios::fixed);
	cout.setf(ios::showpoint);
	cout.precision(2);
 
    cout << "\n\nThe Acme Software Company";  //PROGRAM TITLE
	cout << "\nby Kristen Ngoc, Nguyen";      //PROGRAM AUTHOR
 
	//ASK USER FOR THE AMOUNT OF UNITS YOU WANT TO PURCHASE
 
    cout << "\n\nPlease enter the units you want to purchase:";    //INPUT DATA FOR UNITS
	cin  >> Quantity;
 
	//TEST IF QUANTITY IS GREATER THAN 0
	if (Quantity >= 0)
	{
		//DETERMINE THE DISCOUNT RATE
 
	if (Quantity <10 )
	{
 
		Cost = Quantity * 109;
		Discount = Cost * DiscountRate1;
		TotalCost = Cost - Discount;
		TaxRate = TotalCost *0.0775f;
		AdjustAmount = TotalCost + TaxRate;
	}
 
	else if (Quantity <20)
	{
 
		Cost = Quantity * 109;
		Discount = Cost * DiscountRate2;
		TotalCost = Cost - Discount;
		TaxRate = TotalCost *0.0775f;
		AdjustAmount = TotalCost + TaxRate;
	}
	else if (Quantity <50)
	{
 
		Cost = Quantity * 109;
		Discount = Cost * DiscountRate3;
		TotalCost = Cost - Discount;
		TaxRate = TotalCost *0.0775f;
		AdjustAmount = TotalCost + TaxRate;
	}
	else if (Quantity <100)
	{
 
		Cost = Quantity * 109;
		Discount = Cost * DiscountRate4;
		TotalCost = Cost - Discount;
		TaxRate = TotalCost *0.0775f;
		AdjustAmount = TotalCost + TaxRate;
	}
	else
	{
 
		Cost = Quantity * 109;
		Discount = Cost * DiscountRate5;
		TotalCost = Cost - Discount;
		TaxRate = TotalCost *0.0775f;
		AdjustAmount = TotalCost + TaxRate;
 
	}
 
 
 
  //DISPLAY RESULTS
 
	cout << fixed << showpoint << setw (20);
	cout <<"\nSales Results\n";
	cout <<"- - - - - - - - - - \n";
	cout <<"\n" << setw(20) << "Cost $" << "Cost" << endl;
	cout <<"\n" << setw(20) << "Discount rate " << "DiscountRate" << endl;
	cout <<"\n" << setw(20) << "Discount $" << "Discount" << endl;
	cout <<"\n" << setw(20) << "Total Cost $" << "TotalCost" << endl;
	cout <<"\n" << setw(20) << "Sales Taxes $" << "TaxRate" << endl;
	cout <<"\n" << setw(20) << "Adjust Amount $" << "AdjustAmount" << endl;
 
	}
 
	else
 
		cout << "Invalid entry\n";
	return 0;
}

cout <<"\n" << setw(20) << "Adjust Amount $" << "AdjustAmount" << endl;

cout <<"\n" << setw(20) << "Discount rate " << DiscountRate << endl;

# include <iostream>
# include <iomanip>
# include <string>
using namespace std;
int main()
{
int Quantity, Disc;
double Cost, Discount, SalesTax;
cout.setf(ios::fixed);
cout.setf(ios::showpoint);
cout.precision(2);
cout << "\n\nThe Acme Software Company\nby Kristen Ngoc, Nguyen"; //PROGRAM AUTHOR
do
{
cout << "\n\nPlease enter the units you want to purchase: "; //INPUT DATA FOR UNITS
cin >> Quantity;
if (Quantity == 0)
	break;
Cost = 109.0 * Quantity;
if (Quantity < 10)
	Disc = 0;
else
	if (Quantity < 20)
	 Disc = 20;
	else
	 if (Quantity < 50)
	 Disc = 30;
	 else
	 if (Quantity < 100)
	 Disc = 40;
	 else
	 Disc = 50;
 
cout << fixed << showpoint << setw (20);
cout <<"\nSales Results\n";
cout <<"- - - - - - - - - - \n";
cout << setw(20) << "Cost" << setw(25) << Cost << endl; 
Discount = Cost * (double (Disc) / 100.0);
cout << setw(20) << "Less" << setw(25) << Discount << " " << Disc << "%" << endl;
cout << setw(20) << "Total Cost" << setw (25) << Cost - Discount << endl;
SalesTax = (Cost - Discount) * .0775;
cout << setw(20) << "7.75% Sales Tax" << setw (25) << SalesTax << endl;
cout << setw (45) << "_________________" << endl;
cout << setw(20) << "Total" << setw (25) << Cost - Discount + SalesTax << endl;
} while (1);
return 0;
}