MS Access query question - I am making a query to calculate the price of a finished good. To do so, the equation is ((sum of material cost)+(labor cost))/completed finished goods). The problem is that I need to first sum the material cost of each of the 5 materials and THEN use that number in the calculation above. How can I use this sum in another field within the same query? I want to avoid making a separate query if possible, but if not it's ok.
Thanks!