The Cost of a Flower Business. Jen left a job paying $40,000 per year to start her own florist shop in a build- ing she owns. The market value of the building is $200,000. She pays $30,000 per year for flowers and other supplies, and has a bank account that pays 8 per- cent interest. The annual economic cost of Jen's business (Related to Application 1 on page 32.) is 18 The Opportunity Cost of a Mission to Mars. The United States has plans to spend billions of dollars on a mission to Mars. List some of the possible opportunity costs of the mission. What resources will be used to execute the mission, and what do we sacrifice by using these resources in a mission to Mars?