Will your values always be numeric?
Also what should happen if the return is 1?
If the formula just returns small integers;
=IFERROR(CHOOSE(INDEX('PR Report'!U:U,MATCH(A2&B2,'PR Report'!C:C&'PR Report'!E:E,0)),[what to return for 1], [what to return for 2], [what to return for 3] etc),"")
If the formula just returns small integers;
=IFERROR(CHOOSE(INDEX('PR Report'!U:U,MATCH(A2&B2,'PR Report'!C:C&'PR Report'!E:E,0)),[what to return for 1], [what to return for 2], [what to return for 3] etc),"")