A young chef is considering opening his own sushi bar. To do so, he would have to quit his current job, which pays $20,000 a year, and take over a store building that he owns and currently rents to his brother for $6,000 a year. His expenses at the sushi bar would be $50,000, for food and $2,000 for gas and electricity. What is the sum of his implicit costs?a. $26,000 b. $66,000 c. $78,000 d. $52,000 e. $72,000