since the rentage is $26 plus $ 0.18 per mile
his total rental and mileage charges is $44
to calculate his total mile drive.
total charge - normal charge
total charge for the rental plus mileage is $44
normal charge is $26
$44 - $ 26
the mileage charges is $18
the total mile drive $18/$0.18
the total mile drive is 100 miles
answer is 100miles