Problem 13-7 (Warranties) Alvarado Company sells a machine for $7,400 with a 12-month warranty agreement that requires the company to replace all defective parts and to provide the repair labour at no costs to the customers. With sales being made evenly throughout the year, the company sells 600 machines in 2019 (warranty expense is incurred half in 2019 and half in 2020). As a result of product testing, the company estimates that the total warranty cost is $390 per machine ($170 parts and $220 labour). Instructions: Assuming that actual warranty costs are incurred exactly as estimated, what joumal entries would be made relative to the following facts? (a) Sale of machinery and warranty expense incurred in 2019. (b) Warranty accrual on December 31, 2019. (c) Warranty costs incurred in 2020. (d) What amount, if any, is disclosed in the statement of financial position as a liability for future warranty costs as of December 31, 2019