Me: You know your paying $200 more for that phone right?<p>Them: No, really?<p>Me: It is $8 a month more and at 2 years that is 24 * 8. So in 2 years you are paying $192 more.<p>Them: Shocked look and than they try to do the math in their head and can&#x27;t and just shrug.<p>This has happened with family members and strangers<p>People can&#x27;t do simple math in their head. My definition of simple math is business math and specifically do a 2 digit times a 1 digit number.