$order_items = $order->get_items();
foreach ( $order_items as $item_id => $item ) {
    $item_total = wc_get_order_item_meta( $item_id, '_line_total', true );
}

<?php wc_price($price) ?>

foreach ( $order->get_items() as $item_id => $item ) {
    echo $order->get_formatted_line_subtotal( $item );
}

echo number_format($item_total , 2, '.', '');