MySQL Query - Sum one related table - Count another related table
===

The Count works fine with one related table, but when I add the Sum I get overinflated results in the Count.

    SELECT Orders.kp_OrderID AS `Order #`, 
	    Orders.t_ServiceLevel AS `Service Level`, 
	    Customers.t_CustCompany AS Company, 
	    Orders.t_JobName AS `Job Name`, 
	    Orders.t_JobStatus AS `Status`, 
	    Orders.d_JobDue AS Due, 
	    Orders.ti_JobDue AS Time, 
	    COUNT(OrderItems.kf_OrderID) AS `Line Item`, 
	    SUM(
		    `OrderItemComponents`.`n_QuantityPrintMaterial` * (
			`OrderItemComponents`.`n_WidthInInches` * `OrderItemComponents`.`n_HeightInInches` / 144
       		    )
	        ) AS SqFt, 
	    Orders.nb_JobFinished AS Finished
    FROM Orders 
         INNER JOIN OrderItems ON Orders.kp_OrderID = OrderItems.kf_OrderID
	     INNER JOIN Customers ON Orders.kf_CustomerID = Customers.kp_CustomerID
	     INNER JOIN OrderItemComponents ON OrderItemComponents.kf_OrderID = Orders.kp_OrderID
        WHERE Orders.d_JobDue > (
		    DATE_SUB(CURDATE(), INTERVAL 60 DAY)
	         )
        GROUP BY Orders.kp_OrderID
        ORDER BY `Line Item` DESC
