I am trying to get the following formula to work:

=IF(OR(P13=835,P13=384,P13=386,P13=364),(CONCATENA TE(P13,R13,0,0)),(IF(P13=585,(CONCATENATE(583,R13, 0,0))),(IF(P13=627,(CONCATENATE(0,30,R13,0,0))),(I F(P13=7,(CONCATENATE(0,17,R13,0,0))),(IF(P13=646,( CONCATENATE(147,R13,0,0))))))))

IF P13 = anything other than the numbers in the first section of the
formula, I get a #VALUE error. I am using this to assist a data entry
function.