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 an accounting profit of ______ and an economic profit of ______.

a. $50, $10

b. $90, $50

c. $10, $50

d. $50, $90