Saved Search Case when specific item matches return Quantity

We have some item groups and the executives want to total revenue of the items and then a unit count as well.  Item groups are funky, so I wanted to have a column that sums a specific sku (part of the item group) as ONE unit sold and have a total revenue column next to it.  I am running into problems in that I cannot get the formula to sum the quantity when I put a specific item number requirement on it.  I can sum quantity without this "case when" on just the quantity or I can run it and