class tv
{
public $model;
public $rate;
function ratePlu($r)
{
$this -> rate = $r;
$this -> rate += 2000;
}
function rateMin($r)
{
$this -> rate = $r;
$this -> rate -= 1250;
}
}
$tv1 = new tv();
$tv1->ratePlu(5500);
echo $tv1->rate;
$tv1->rateMin(7250);
echo $tv1->rate;