Computer Smuggler

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Computer Smuggler</title>
</head>
<body>
    <form action="" method="get">
        <input type="text" name="list" value="CPU, RAM, VIA, ROM, RAM, RAM, CPU, CPU, CPU, VIA, ROM, ROM, CPU"/>
        <input type="submit"/>
    </form>
    <?php
        if (isset($_GET['list'])) {
            $input = $_GET['list'];
            $allComputerParts = explode(", " , $input);
            $parts = [];
            $priceCPU = 85;
            $priceROM = 45;
            $priceRAM = 35;
            $priceVIA = 45;

            foreach ($allComputerParts as $computerPart) {
                if ($computerPart == "CPU") {
                    if (isset($parts['CPU'])) {
                        $parts['CPU']++;
                    }
                    else {
                        $parts['CPU'] = 1;
                    }
                }
                else if ($computerPart == "ROM") {
                    if (isset($parts['ROM'])) {
                        $parts['ROM']++;
                    }
                    else {
                        $parts['ROM'] = 1;
                    }
                }
                else if ($computerPart == "RAM") {
                    if (isset($parts['RAM'])) {
                        $parts['RAM']++;
                    }
                    else {
                        $parts['RAM'] = 1;
                    }
                }
                else if ($computerPart == "VIA") {
                    if (isset($parts['VIA'])) {
                        $parts['VIA']++;
                    }
                    else {
                        $parts['VIA'] = 1;
                    }
                }
            }

            if ($parts['CPU'] >= 5) {
                $priceCPU /= 2;
            }
            if ($parts['ROM'] >= 5) {
                $priceROM /= 2;
            }
            if ($parts['RAM'] >= 5) {
                $priceRAM /= 2;
            }
            if ($parts['VIA'] >= 5) {
                $priceVIA /= 2;
            }

            $moneySpent = $parts['CPU'] * $priceCPU + $parts['ROM'] * $priceROM + $parts['RAM'] * $priceRAM + $parts['VIA'] * $priceVIA;
            $moneyEarned = 0;

            //var_dump($Parts);
            $computersCount = 0;
            $partsLeftCount = 0;
            while ($parts['CPU'] > 0 && $parts['ROM'] > 0 && $parts['RAM'] > 0 && $parts['VIA'] > 0) {
                $computersCount++;
                $moneyEarned += 420;
                $parts['CPU']--;
                $parts['ROM']--;
                $parts['RAM']--;
                $parts['VIA']--;
            }

            if ($parts['CPU'] <= 0 || $parts['ROM'] <= 0 || $parts['RAM'] <= 0 || $parts['VIA'] <= 0) {
                $partsLeftCount = $parts['CPU'] + $parts['ROM'] + $parts['RAM'] + $parts['VIA'];
            }

            while ($parts['CPU'] > 0) {
                $moneyEarned += $priceCPU;
                $parts['CPU']--;
            }
            while ($parts['ROM'] > 0) {
                $moneyEarned += $priceROM ;
                $parts['ROM']--;
            }
            while ($parts['RAM'] > 0) {
                $moneyEarned += $priceRAM;
                $parts['RAM']--;
            }
            while ($parts['VIA'] > 0) {
                $moneyEarned += $priceVIA;
                $parts['VIA']--;
            }

            //echo $moneySpent . "</br>";       YES
            echo $moneyEarned;                // NO
            //echo $partsLeftCount . "</br>";   YES
            echo $moneyEarned - $moneySpent;
        }
    ?>
</body>
</html>