These would be things like business mileage on your personal vehicle, a home office, maybe your cell phone and internet, etc. 

I always self-managed, good salary job that I could take off from as long as people could reach me, this was prior to cell phones.

@Christine Kankowski Here's a link to a Wall Street Journal article from last night entitled "Zillow Intends to Buy and Flip Homes"...

If that works for you, please reply to this email to confirm and I will add you to my showing appointment book.Also, as a means of courtesy to both our busy schedules, please confirm via text or phone call at least 2 hours prior on the day of the showing to my cell phone (area code and number).I’ve also attached our rental application.

Via Email Or Cell I Have Great Buyers In The Shelby Market.

After a week of calling his cell, office phone, speaking with the office assistant, and emailing him, I finally reached the listing agent. 

I called the number (cell phone were an expensive rarity) and the message told me to leave a number and my call would be returned after 5:00 PM.

., BS, American Journal of Otolaryngology, January–February, 2015Unlike all other breeds, pit bull terriers were relatively more likely to attack an unknown individual (+31%), and without provocation (+48%).Dog bites of the head and neck: an evaluation of a common pediatric trauma and associated treatment, by O'Brien et al., BS, American Journal of Otolaryngology, January–February, 2015Our data were consistent with others, in that an operative intervention was more than 3 times as likely to be associated with a pit bull injury than with any other breed.Characteristics of 1616 Consecutive Dog Bite Injuries at a Single Institution, by by Golinko et al., Clinical Pediatrics, July 2016That's why I don't accept pit bulls.

You may also be able to manage without a car.No need for a cell phone, get rid of it.

They used the premixed mastic but the 300lb guy (who left his cell phone on the window sill) couldn't believe the mastic had not set in 3 hrs so he could walk on it.