Need urgent help with my php program

Hey i'm currently developing a php console mode program for a client. It is a tax program that prompts the user the annual gross income, calculates the tax payable and then displays the gross income and mount of tax payable.

Here is the code,

#!/usr/local/bin/php -q
<?php
//tax.php
require ("phpio");

$gross = 0;
$tax = 0.0;

print ("\n\n Enter annual gross income: ");
$gross = input();

if ($gross >= 6001 && $gross <= 35000 )
{
  $tax = $gross - 6000;
  $tax = $tax * 0.15;
}

if ($gross >= 35001 && $gross <= 80000)
{
  $tax = $gross - 35000;
  $tax = $tax * 0.30;
  $tax = $tax + 4350;
}

if ($gross >= 80001 && $gross <=180000)
{
  $tax = $gross - 80000;
  $tax = $tax * 0.38;
  $tax = $tax + 17850;
}

if ($gross >= 180001)
{
  $tax = $gross - 180000;
  $tax = $tax * 0.45;
  $tax = $tax + 55850;
}

print ("\nGross pay is:\n");
print ("$ $gross\n\n");
print ("Tax payable:\n");
print ("$ $tax\n\n ");
?>

Code (markup):

There is one problem with it. If the user reports tax on 35001 and it is 4350.3. But i want it to display 4350.30. How would i do this. Any help would be much appreciated.

 

try money_format : http://www.php.net/manual/en/function.money-format.php
it doesn't work on windows though so you might have to go with number_format

and if that still isn't good enough there's always sprintf

http://www.php.net/manual/en/function.sprintf.php

 

or check to see if 2 digits are in decimal and if not, add a zero