sells pens with a company's logo printed on the pens. Writing World charges a standard price per box of pens when the customer purchases 200 or fewer boxes. Each box over 200 that the customer purchases is sold at a discounted rate. A customer purchases x boxes of pens,where x ≥ 200. The average cost of a single box of pens purchased by this customer is 1600+6(x-200) represented by X What is the meaning of the parts of this rational expression in the context of the situation? ​

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