Looking for Count of Field1 where Field2 is in High, Medium, or Low. Field 1 can only be counted once

I need a count of how many are HIGH, MEDIUM, LOW based on the following logic Looking at the highlighted examples: L14815 counts against high but not medium L14495 counts against Medium but not low i.e. if a RECORD name is duplicated then the count only increments for the higher priority Each record name is only counted once and in its highest category only ![alt text][1] [1]: /storage/temp/3490-1.png