Thanks for the reply.
I'm trying to use your suggestion but without success.
Could you use the attached qvw to suggest a way.
suppress dimensions.qvw 154.0 K
Sorry, I misunderstood your requirement.
I'm not sure you can effectively suppress a dimension in your chart for just one of your expressions. The expressions will be evaluated in the context of the dimensions.
You can vary the expression, of course. You can even vary the expression based on the context of its dimension. But neither will help you, here.
I suppose you could create a table just for your Purchases and park it right next to your Sales table.
Perhaps someone else will see somehting I'm missing here.