Answer: He makes $111.80 in 2 days.
Explanation:
Since we have given that
Amount he makes in 3 days = $167.70
Number of days = 3
We need to find the amount he makes in 2 days.
We will use "Unitary method" to find the amount s in 2 days.
In 3 days , amount = $167.70
In 1 day, amount is given by

In 2 days, amount is given by

Hence, he makes $111.80 in 2 days.