I feel you should add an option: I work 35-40 hours and have no problem working a little more when needed.
You seem to have chosen 40 and 45 as points of interest but don't allow anything less than 40 (to me, it seems you imply 40 or more hours, even with "I work roughly 40 hours").
You seem to have chosen 40 and 45 as points of interest but don't allow anything less than 40 (to me, it seems you imply 40 or more hours, even with "I work roughly 40 hours").