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Recently, however, the time differential has considerably shortened, and Lotan is now expensing the marketing costs as incurred. 2. In 2014, the company examined its entire policy relating to the depreciation of plant equipment. Plant equipment had normally been depreciated over a 15-year period, but recent experience has indicated that the company was incorrect in its estimates and that the assets should be depreciated over a 20-year period. 3. One division of Lotan Corp., Hawthorne Co., has consistently shown an increasing net income from period to period. On closer examination of its operating statement, it is noted that bad debt expense and inventory obsolescence charges are much lower than in other divisions. In discussing this with the controller of this division, it has been learned that the controller has increased his net income each period by knowingly making low estimates related to the write-off of receivables and inventory. 4. In 2014, the company purchased new machinery that should increase production dramatically. The company has decided to depreciate this machinery on an accelerated basis, even though other machinery is depreciated on a straight-line basis. 5. All equipment sold by Lotan is subject to a 3-year warranty. It has been estimated that the expense ultimately to be incurred on these machines is 1% of sales. In 2014, because of a production breakthrough, it is now estimated that 1/2 of 1% of sales is sufficient. In 2012 and 2013, warranty expense was computed as $64,000 and $70,000, respectively. The company now believes that these warranty costs should be reduced by 50%. 6. In 2014, the company decided to change its method of inventory pricing from average-cost to the FIFO method. The effect of this change on prior years is to increase 2012 income by $65,000 and increase 2013 income by $20,000