Answer
The estimated annual income is 41600.
The actual annual income is 39998.40.
Work Step by Step
Number of weeks in an year = 52
Income of the man = 19.50 per hour
Hours to work per week = 40
Therefore, estimated annual income of the man is = 20 x 40 x 52
= $41600.
Actual annual income = 39998.4
It is still a reasonable estimate, but the difference is 1,601.60.