Costco co-founder still goes into the office weekly at age 89: 'To be successful, you've got to be pretty focused'

Costco co-founder still goes into the office weekly at age 89: 'To be successful, you've got to be pretty focused'

Costco co-founder Jim Sinegal officially retired in 2012. But, the 89-year-old's passion for the company keeps him coming back each week.