Question: In 2011, Toni taught music and earned $20,000. She also earned $4,000 by renting out her basement. On January 1, 2012, she quit teaching, stopped renting out her basement, and began to use it as the office for her new Web site design business. She took $2,000 from her savings account to buy a computer. During 2012, she paid $1,500 for the lease of a Web server and $1,750 for high-speed Internet service. She received a total revenue from Web site designing of $45,000 and earned interest at 5 percent a year on her savings account balance. Normal profit is $55,000 a year. At the end of 2012, Toni could have sold her computer for $500. Calculate Toni's opportunity cost of production and her economic profit in 2012.