An investment club has set a goal of earning 15% on the money they invest in stocks. The members are considering purchasing three possible stocks, with their cost per share (in dollars) and their projected growth per share (in dollars) summarized in the following table.

(a) If they have $392,000 to invest, how many shares of each stock should they buy to meet their goal?
(b) If they buy 1000 shares of retail stock, how many shares of the other stocks do they buy? What if they buy 2000 shares of retail stock?
(c) What is the minimum number of shares of computer stock they will buy, and what is the number of shares of the other stocks in this case?
(d) What is the maximum number of shares of computer stock purchased, and what is the number of shares of the other stocks in this case?

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Stocks Utility (U) Retail (R) Computer (C) 30 6.00 44 6.00 Cost/share 26 2.40 Growth/share