if then statement (1 Viewer)

I have the following formula established for each of my (8) hours field. It is working for the first two fields but not for any of the others. Is there another way I can get this accomplished?

if {time.time_code_id_1} = 0 then {@hours1} else 0

hours1 is a formula field I have created
if ISNULL ({time.hours_1}) then 0
else {time.hours_1}