Calculate the actual profit for order number 10100.
SUM(MULTIPLY(quantityOrdered (SUBTRACT (priceEach, buyPrice));
SELECT SUM((t1.priceEach - t2.buyPrice) * t1.quantityOrdered) FROM orderdetails AS t1 INNER JOIN products AS t2 ON t1.productCode = t2.productCode WHERE t1.orderNumber = '10100'