McNally Corporation makes a special ski. Next year, McNally expects to produce 20.000 poirs of skis Seven pounds of fiberglass ore required to make each peir of skis. The company expects to heve 21,000 pounds of fibergloss in inventory ot the end of this year and next year wants to have an ending inventory of fibergless of 18,000 pounds O 160000 pounds O 158.000 pounds O None of these O 137000 pounds O 140,000 pounds