Hey,
I am looking to sum up the Retail Price column of my Detail for only 2 Different Styles on my Invoice.

So say there are Style number 50 and 51 on my invoice, I need to total the retail on thier lines. Is there a way to do this in a formula?

Ex.

Style# - Retail Price
50 - 12$
39 - 19$
11 - 62$
51 - 26$
50 - 12$

Sum of 51's and 50's = 50$