Given Data:
Ben earned $400 last month.
Since in the academic calendar the last month was July consisting of 31 days.
Therefore the amount earned per day can be calculated as
Now, He worked 3 days in the first week and 2 days in the second week.
So the total number of working days is 5.
Therefore the amount earned for 5 days will be
Therefore the amount for 6 days is approximate $65.
And Hence for each day it is $13.