To find the agency's fee per mile, we can use the following formula:
Fee per mile = (total mileage cost) / (total miles driven)
Let's first find the total mileage cost for both people:
Total mileage cost = $232.30 + $175.95 = $408.25
Next, let's find the total miles driven:
Total miles driven = 1010 miles + 765 miles = 1775 miles
Now, we can plug these values into the formula:
Fee per mile = $408.25 / 1775 miles ≈ $0.23 per mile
Therefore, the agency's fee per mile is approximately $0.23.