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Is this possible?
I have created a master measure, say revenue. I think created another master measure call QTY. Can I create a 3rd master measure (unit revenue) which is the master measure revenue / master measure QTY?
I don't think you can use the master measures in an expression. I believe that you need to used each expression that made the master measures in your new measure.
Mark is correct you will need to combine the expressions in the master items.
Variables can be re-used though, so in these instances you can use variables for the parts and even one equivalent to the master measure