#include <iostream>

using namespace std;

int main()
{
  float taxRate, saleAmount;
  char residence;

  // get input
  cout << "Enter the amount of the sale: ";
  cin >> saleAmount;
  if (saleAmount <= 0)
    {
      cout << "Error: sale amount must be greater than 0!" << endl;
      return 0;   // end program
    }  // end if

  cout << "enter I for in-state and O for out-of-state: ";
  cin >> residence;

  // Set taxRate based on residence
  // in-state has tax rate of .05
  // out-of-state has tax rate of 0
  if ((residence == 'I') || (residence == 'i'))
    {
      taxRate = .05;
    }
  else
    {
      taxRate = 0;
    }

  saleAmount = saleAmount + (saleAmount * taxRate);
  cout << "The total is " << saleAmount << endl << endl;

  return 0;
}  // end main