BigBook. Com uses LIFO inventory accounting. Notes to BigBook Com's Year 9 financial statements disclose the following (it has a marginal tax rate of 37%): Inventories Year 8 Year 9 Raw materials $392,675 $369,725 Finished products 401 342 377,104 794,017 746,829 Less LIFO reserve (42,000) (54,000) $752,017 $692,829 Required: Determine the amount by which Year 9 retained earnings of BigBook.Com changes if FIFO is used. (5 points) Determine the amount by which Year 9 net income of BigBook Com changes at FIFO is used for both Years 8 and 9. (5 points) Discuss the usefulness of LIFO to FIFO restatements in an analysis of BigBook Com (5 points)