A business owner makes 1000 items a day. Each day she spends 8 hours producing those items. If hired, elsewhere she could have earned $250 an hour. The item sells for $15 each. Production occurs seven days a week. If the explicit costs total $150,000 per month, what is her economic profit?

a. $300,000
b. $60,000
c. $450,000
d. $240,000

d