**Exercise D.**

Bill wants to make copies of a 1-page document. He learns that the first 100 copies cost 6 cents per copy, while additional copies cost only 4 cents per copy. Write a single Maple function that gives the total cost, as a function of the number of copies. Show the Maple command(s) that creates this function, and also show the single Maple command that will plot this function for up to 600 copies.

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