Penny left her waitress job, which paid $40,000 per year, and invested $10,000 from her savings account (which was earning 10 percent interest) in her new business, Penny Blossoms, which sold designer hair clips. Her projected total revenue is $70,000 and her projected explicit costs add up to $29,000 her first year. Her economic profit from this first year is expected to be:

a. $70,000
b. $41,000
c. $1,000
d. $0