The following table presents sales revenue, cost of goods sold, and inventory amounts for three computer/electronics companies, Samsung Electronics Co., Hewlett-Packard Company, and Apple Inc.

REQUIRED:

a. Compute the gross profit margin (GPM ) for each of these companies for all three fiscal years.

b. Compute the inventory turnover ratio and the average inventory days outstanding for each company for the last two fiscal years. (All three firms use FTFO inventory costing.)

c. What factors might determine the differences among these three companies' ratios?

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($ millions) Fiscal year ending Samsung Electronics Co. Ltd. (S. Karean won) Dec. 31, 2017 Dec 31, 2016 Dec. 31, 2015 Revenues. 239,575,376 201,866,745 200,653,482 129,290,661 Cost of goods sold Inventary.... Hewlett-Packard Company (US dollar) Revenues (products only). Cost of goods sold Inventory.. Apple Inc. (US dollar) 120,277,715 123,482,118 18,811,794 Oct. 31, 2016 24,983,355 18,353,503 Oct. 31, 2018 Oct. 31, 2017 58,472 52,056 48,238 47.803 42,478 39,240 6,062 4.484 Sep. 30, 2016 215,639 5,786 Sep. 30, 2018 Sep. 30, 2017 229,234 141,048 4,855 Revenues ... 265,395 Cost of goods sold Inventory... 163,756 131,376 3,956 2,132