6)On December 31, 2010, Delta changed its inventory valuation method from the weighted average method to LIFO for financial statement purposes. As of that date, if Delta had always been using the LIFO method, its COGS (for all years combined) would have been $150 lower. The tax rate is (and always has been) 30%. By what amount, and in which direction (increase or decrease), should R.E. be adjusted on January 1, 2011 to reflect this change to LIFO: 7)Beta purchased a machine on January 1, year 1, for $600. On the date of acquisition, the machine had an estimated useful life of six years with no salvage value. The machine was being depreciated on a straight-line basis. On January 1, year 4, Beta determined that the machine had an estimated life of eight years from the date of acquisition and a salvage value of $40.What is the amount of the depreciation expense that should be recorded at the end of year 4? 8)Energy, Inc began operations in 2015 using the LIFO inventory method. At the beginning of 2016, it switches to FIFO. The beginning inventory for 2016 using LIFO was $80. Under the FIFO method, the beginning inventory is $100. What adjustment to retained earnings on 1/1/16 is necessary to reflect this change in inventory method? (ignore taxes). 9) Bob purchased shares of Delta for 60 on December 22, 2013. The fair value of these securities on December 31, 2013 was 54. Prepare the journal entries for Bob to show the purchase of the securities, and the adjustment of the securities to fair value at 12/31/13. 10) On January 3, 2014, Bob sold the securities for $65. Prepare the journal entries for the sale and the removal of the investment from the books