How many 2003 Harley-Davidson Eagle Drag Bikes were ordered?
2003 Harley-Davidson Eagle Drag Bikes refers to productName; how many ordered refers to COUNT(quantityOrdered);
SELECT SUM(t2.quantityOrdered) FROM products AS t1 INNER JOIN orderdetails AS t2 ON t1.productCode = t2.productCode WHERE t1.productName = '2003 Harley-Davidson Eagle Drag Bike'