ok...can someone tell me WHY this gives me "SQL: Group by clause missing or invalid" in VFP8

Sele inv_no, inv_locat, serial_no, sum(cost) as totcost,;
Descrip, budget, user_code, phys_loc, Source, ;
duplicate, loc_name, loc_code;
From shrt1 group by 1 into cursor short2


yet this one doesn't?
SELECT inv_no, sum(cost) as totcost FROM shrt1 GROUP BY 1 INTO CURSOR chkcst


The only difference between the two statements (that I can see) is the field list....