Andria Mullins, financial manager of Webster Electronics, has been asked by the firms CEO, Fred Weygandt, to evaluate the companys inventory control techniques and to lead a discussion of the subject with the senior executives. Andria plans to use as an example one of Websters ?obig ticket?? items, a customized computer microchip that the firm uses in its laptop computers. Each chip costs Webster $200, and in addition it must pay its supplier a $1,000 setup fee on each order. Further, the minimum order size is 250 units. Websters annual usage forecast is 5,000 units, and the annual carrying cost of this item is estimated to be 20% of the average inventory value. Andria plans to begin her session with the senior executives by reviewing some basic inventory concepts, after which she will apply the EOQ model to Websters microchip inventory. Webster runs a $l00,000 per month cash deficit, requiring periodic transfers from its portfolio of marketable securities. Broker fees are $32 per transaction, and Webster earns 7% on its investment portfolio.

How can Andria use the EOQ model to determine how Webster should liquidate part of its portfolio to provide cash?