Icebreaker Company (a U.S.-based company) sells parts to a foreign customer on December 1, 2020, with payment of 28,000 dinars to be recelved on March 1, 2021. Icebreaker enters into a forward contract on December 1, 2020, to sell 28,000 dinars on March 1, 2021. The forward points on the forward contract are excluded in assessing hedge effectiveness and are amortized to net income using a straight-line method on a monthly basis. Relevant exchange rates for the dinar on various dates are as follows: Icebreaker must close its books and prepare financial statements at December 31. a-2. What is the impact on 2020 net income? a-3. What is the impact on 2021 net income? a-4. What is the impact on net income over the two accounting periods? (Negative amounts should be entered with a minus sign. Do not round intermediate calculations.)