Creating A Stacked Bar Chart with 2 Dimensions

[Doby_the_Shark]

Hello Everyone,

I am currently trying to create a stacked bar chart, similar to the one below.

As of right now, I have gotten as far as this...

My question is, how do I create an expression that allows me to break out the charts into the respective quarters?

I currently have the following expression as my dimension: =IF (MATCH([SUBTYPE],'INVOICE') OR MATCH([SUBTYPE],'EXPENSEREPORT'),[SUBTYPE])