Final answer:
The lowest monthly profit listed is $400, which is the minimum figure among the provided profit amounts.
Step-by-step explanation:
To determine the lowest monthly profit in either year, we should look at the profits listed and find the smallest number. The profits given in the various pieces of information are $400, $1200, $1000, and $1400. Among these figures, the lowest value is $400, which implies that it is the lowest monthly profit in either year.