I need help with the following question:

Can you show me how you computed the answer? I'm stumped at the moment.

The management ofSkysongCompany has asked its accounting department to describe the effect upon the company's financial position and its income statements of accounting for inventories on the LIFO rather than the FIFO basis during 2020 and 2021. The accounting department is to assume that the change to LIFO would have been effective on January 1, 2020, and that the initial LIFO base would have been the inventory value on December 31, 2019. The following are the company's financial statements and other data for the years 2020 and 2021 when the FIFO method was employed.