. Kenny holds two jobs - a full-time job with R Corporation and a part-time job with Z Corporation. Kenny uses his car to drive to work. The mileage is as follows: from Kenny's home to R is 70 miles; from R to Z is 10 miles; and from Z to Kenny's home is 70 miles. Kenny's deductible mileage for each work day is:

1. 10 miles.
2. 70 miles.
3. 80 miles.
4. 150 miles.