A news dealer buys papers for 30 cents each and sells them for 50 cents each. Newspapers not sold at the end of the day are sold as scrap for 5 cents each. Newspapers can be purchased in bundles of 10 . Thus, the newsstand can buy 50 or 60 or 70 papers, and so on. The distribution of newspapers demanded is given in Table 1 . 1. Let D be the demand, N be the number of newspapers to buy, u be the unit cost, s and c be the selling price and salvage price (price at which newspapers are sold as scrap) respectively. Write done the formula for total profit ( T ). (5 points)