Trying to figure out why my Defined constant isnt working in the code,can someone hel

[david2180]

(Note: added [noparse]

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Im trying to figure out why this code isn't working with the define NET_INC_FACTOR below,I would appreciate any info you can help with.
[code=php]
define('NET_INC_FACTOR',"0.57");

  $sales = 190000;
  $rent = 25000;
  $salaries = 37500;
  $supplies = 410;
  $NET_INC_FACTOR=(NET_INC_FACTOR);
  $total_costs = $rent + $salaries + $supplies;
  $operating_income = $sales-$total_costs;
  $net_income = $operating_income*$NET_INC_FACTOR;
  echo "Sales : $$sales <br /><br/>";
  echo "Expenses<br/><br/>";
  echo "Rent : $$rent <br/>";
  echo "Salaries : $$salaries<br/>";
  echo "Supplies : $$supplies<br/><br/>";
  echo "Total : $";
  printf("%01.0f",$rent+$salaries+$supplies);
  echo "<br/>";
  echo "Operating Income : $";
  printf("%01.0f",$operating_income * $NET_INC_FACTOR);
  echo "<br/>";
  echo "Net Income : $";
  printf("%01.0f",$operating_income * $NET_INC_FACTOR);

[NogDog]

Firstly, it pretty much defeats the purpose of defining a constant if you are then going to assign it to a variable and then use that variable. Instead, just use the constant. Also, while PHP is loosely typed so it likely does not matter, I would not quote the numeric value you are assigning it in the define(), assuming you want to use that value simply as a number and not as a string literal.

Otherwise, I might need a hint as to what you mean by "not working" in order to go any further with this.