//define the variable inputs

$profit= 1.20;
$tonprice= 0.01;
$mm1= 63;
$mm2= 20;


//start calculating the box price based on the algorythm

$a= (2*$length)+(2*$width)+$mm1; $b= (1*$width)+(1*$debth)+$mm2;
$m2= ($a * $b)/1000;
$gramweight= ($m2*479)/1000;
$price= ($gramweight*$tonprice);
$customertotal= ($price*$profit);

//calculate the output for the customertotal which is the price plus our profit

{
echo "Based on your box size each box will cost - ";

//display the price to the customer in Rands rounded up to 2 decimal points

echo "R" . number_format($customertotal, 2). "\n";
}