magento - 将订单金额从当前货币转换为基础货币

我正在尝试将订单金额从当前货币转换为基础货币，下面是我尝试过的代码，但没有成功。

$baseCurrencyCode = Mage::app()->getStore()->getBaseCurrencyCode(); 
$currentCurrencyCode = Mage::app()->getStore()->getCurrentCurrencyCode(); 
$price = 1; 

$priceTwo = Mage::helper('directory')->currencyConvert($price, $baseCurrencyCode, $currentCurrencyCode); 

UPDATE

试试这个代码，可能对你有帮助。对于本例，我使用总量。如果基础货币与当前货币不同，则会发生变化。

    $amount = $this->getOrder()->getGrandTotal();

    $baseCurrencyCode = Mage::app()->getStore()->getBaseCurrencyCode();
    $currentCurrencyCode = Mage::app()->getStore()->getCurrentCurrencyCode();

    if ($baseCurrencyCode != $currentCurrencyCode) {
        // convert price from current currency to base currency
        $amount = Mage::helper('directory')->currencyConvert($amount, $currentCurrencyCode, $baseCurrencyCode);

        // convert price from base currency to current currency
        //$priceTwo = Mage::helper('directory')->currencyConvert($amount, $baseCurrencyCode, $currentCurrencyCode);
    }

    $amountFinal = round($amount, 2);