total value of product ID 7 delivered
	2229.70

Display the total value for product ID 7 in the deliveries table. Note that product Id 7 was delivered twice. The first one is on Oct. 11,2016-12 units of $79.99 per unit. The second one is on Oct. 12, 2016--18 units of $69.99 per unit. The displayed total value for the ProductID 7 should be 12x79.99 + 18x69.99=2219.70

Sql exercise 5.4

I have this

Select sum(quantity*price) AS "Total vaule of Product ID 7 delivered" from Sales.OrderDetails Where Sales.orderDetalis = 7

but get

The multi-part identifier "Sales.orderDetalis" could not be bound.