when ([BRT]="A")
  "First letter sent on"&date2([BRDate])&if([BRInfo]=blank,"",[BRInfo])
when ([BRT]="B")
  "Second letter sent on"&date2([BRDate])&if([BRInfo]=blank,"",[BRInfo])
when ([BRT]="C")
  "Third letter sent on"&date2([BRDate])&if([BRInfo]=blank,"",[BRInfo])
otherwise
  "No request letter sent"
end case