Please see the attached workbook. On Sheet 9 I concatenated the 'Category' and 'Category Sale Status' fields and embedded that within the COUNTD function to get the results you need. I've attached the workbook (although it is in Tableau 9, so if you don't have that yet you will have to upgrade).
The function is: countd([Catergory]+', '+[Category Sale Status])
Test - countd.twbx 1.0 MB