A business owner makes 50 items a day. She spends 8 hours in producing those items. If hired elsewhere she could have earned $10 an hour. The item sells for $10 each. Production occurs seven days a week. If the explicit costs total $10,000 a month the economic profit for the month equals:_____--

a. $2,600
b. $5,000
c. $2,240
d. $11,760