Xats to USD Cash converter php

    function xatsToCash($xats, $initialCost=5, $xatsPerDay=13) {
        //Function by Actavus, using the buy page of xat
        //For a range of price of xats do: xatsToCash(xats, 200) ~ xatsToCash(xats, 5)
        switch($initialCost) {
            case 5:
                $xatsR = 500;
                $daysR = 30;
            break;
            case 10:
                $xatsR = 1200;
                $daysR = 60;
            break;
            case 20:
                $xatsR = 2500;
                $daysR = 150;
            break;
            case 40:
                $xatsR = 6000;
                $daysR = 360;
            break;
            case 200:
                $xatsR = 33000;
                $daysR = 1980;
            break;
            default:
                $xatsR = 500;
                $daysR = 30;
                $initialCost = 5;
            break;
        }
        $xatsT = ($xatsR + ($daysR * $xatsPerDay));
        $totalValue = floor(($xats / $xatsT) * $initialCost);
        return $totalValue;
    }