Harley Davidson racing 750cc two cylinder WR and KR model flatheads or the 1940's and early 1950's gave a choice between DOW Metal (Magnesium) and Aluminum for pistons. See piston section on copy of instruction sheet attached.
Ron
Found the below at... http://jwalk.com/ss/excel/usertips/tip080.htm
Using the CONCATENATE function
Yet another option was suggested to me by B. Ganesh: Use the CONCATENATE function. In this case, each argument for CONCATENATE consists of an IF function.
Here's an example...