Can someone explain and help please?

First 15,000 4 60,000 2 Second 12,500 4 50,000 ? Thira 7,500 4 30,000 7 15,000 4 60,000 24,000 Required production in units of finished goods Units of raw materials needed per unit of finished goods Units of raw materials needed to meet production Desired units of ending raw materials inventory Total units of raw materials needed Units of beginning raw materials inventory Units of raw materials to be purchased Unit cost of raw materials Cost of raw materials to be purchased 16,000 7 $ 5 $ 7 ? ? 5 ? 7 7 5 2 7 ? 5 ? $ $ Perry, Inc. desires to maintain the ending inventory of raw materials at 40 percent of the next quarter's raw material needs. What Is the cost of raw materials to be purchased in the first quarter? $300,000 $320,000 $380,000 $400,000