ELSEIF ((nProgDrive% <> nArtDrive%) AND (nArtDrive% = nFiltersDrive%)) OR ((nProgDrive% <> nFiltersDrive%) AND (nArtDrive% = nFiltersDrive%)) OR ((nProgDrive% = nFiltersDrive%) AND (nArtDrive% <> nFiltersDrive%)) THEN
'' Take care of REQUIRED strings
ProgCost& = 0
IF GetSymbolValue (CHK_PROG_FILES$) = _ON$ THEN
ProgCost& = ProgCost& + VAL (PROG_COST$) + VAL (FILTERS_COST$) + VAL (SEL_COST$)