help with mathematics equation

[aron]

Hi all i need help wotking something out.

in my database i have a field. init_price and the field is a FLOAT 10,2.

couple of recordsi have in there look like this.

10.50
52.00

(they are prices)

what i need to do is work out GST (Tax) on them

so.

10.50 * .10 = 1.05
10.50 + 1.05 = 11.55

i then need to print that 11.55.

how do i do this.

i tried

$init_price = $line [init_price];
$my = (int)($init_price * .10);

echo $my;

but it comes out like this.

11.000000 ment to be 1.05

cheers aron.

[bradgrafelman]

$amount = 10.50;
$tax = $amount * .10;

echo 'After ' . $tax . ' in tax, the amount is: ' . number_format($amount + $tax, 2 );

[NogDog]

<?php
$init_price = 10.50;
$tax = round($init_price * 0.1, 2);
$total = round($init_price + $tax, 2);
// show the three values:
printf('$%.2f + $%.2f = $%.2f', $init_price, $tax, $total);
?>