Can someone look at this and see why Excel won't accept this formula? Says
it contains an error and hilites the 2nd to last 'match' in the formula.
(Note: Range names are used throughout, and they are all valid.)

=IF(O3<"","",
IF(L3=9,AT3,
IF(L3=10,OFFSET(SMBBASE,MATCH(G3,SMBPROD,0),MATCH( L3,SMBSL,0)),
IF(L3<5,OFFSET(SNTBASE,MATCH(G3,SNTPROD,0),MATCH(L 3,SNTSL,0)),
IF(L3<9,OFFSET(SNTOSBASE,MATCH(G3,SNTOSPROD,0),MAT CH(L3,SNTOSSL,0)),
IF(L3<15,OFFSET(IPSBASE,MATCH(G3,IPSPROD,0),MATCH( L3,IPSSL,0)),
IF(L3<19,OFFSET(IPSOSBASE,MATCH(G3,IPSOSPROD,0),MA TCH(L3,IPSOSSL,0)),"")))))))