During year 1, Frank, a cash-basis taxpayer, sold a piece of land that had an adjusted basis to him for $110,000 to Tony for $200,000. Tony paid $50,000 down and agreed to pay $30,000 per year plus interest for the next 5 years beginning in January of Year 2. Frank incurred selling expenses of $10,000. Assuming Frank reports gains under the intallment method, what is the amount of gain to be included in Frank's gross income for Year 1?

a. 18,000 b. 20,000 c. 22,500 d. 32,000