Raj opens up a lemonade stand for two hours. He spends $10 for ingredients and sells $60 worth of lemonade. In the same two hours, he could have mowed his neighbor's lawn for $40. Raj has accounting profit of _____ and an economic profit of _____. Select one: a. $50, $10. b. $90, $50. c. $50, $90. d. $10, $50.