Peter sold a painting in 2010 for $100,000. Peter bought the painting in 1999 for $60,000. Peter received $30,000 in 2010 and is to receive $15,000 per year (plus interest) for 2011 through 2014. How much gain must Peter recognize in 2010?
a. $12,000
b. $28,000
c. $30,000
d. $40,000
e. none of the above