Select 
CLDOC_FD AS CLAVE,
CLPRO_FD AS PRO,
CANTI_FD,
TREGI_FD,
(111100+3)*(-1) AS CLDOC_F

From  "C:\bases limprofu\bases\remisiod.dbf" 
WHERE CLPRO_FD="58051091001"  
AND (TREGI_FD<>"C" OR TREGI_FD IS NULL)