David R. and Ella M. Cole (ages 39 and 38, respectively) are husband and wife who live at 1820 Elk Avenue, Denver, CO 80202. David is a self-employed consultant specializing in retail management, and Ella is a dental hygienist for a chain of dental clinics. David earned consulting fees of $145,000 in 2018. He maintains his own office and pays for all business expenses. The Coles are adequately covered by the medical plan provided by Ellas employer but have chosen not to participate in its 401(k) retirement plan.