UNIVERSAL CANNING INC., MS. MA. LOURDES A. LOSARIA, PERSONNEL OFFICER, AND ENGR. ROGELIO A. DESOSA, PLANT MANAGER, PETITIONERS, VS. COURT OF APPEALS AND DANTE SAROSAL, FRANCISCO DUMAGAL, JR., NELSON E. FRANCISCO, ELMER C. SAROMINES AND SAMUEL D. CORONEL, RESPONDENTS