In a survey of 100 students the following observations were made:41 students read Punch magazine,29 students read Time magazines,26 students read Ovation magazine,15 students read Punch and Time magazines,8 students read Time and Ovation magazines,19 students read Punch and Ovation magazines and 5 students read all the three magazines. Find the number of students among the 100 that did not read any of the three magazines. How many read one of the three magazines​

T-comm makes a variety of products. it is organized in two divisions, north and south. the managers for each division are paid, in part, based on the financial performance of their divisions. the south division normally sells to outside customers but, on occasion, also sells to the north division. when it does, corporate policy states that the price must be cost plus 20 percent to ensure a "fair" return to the selling division. south received an order from north for 300 units. south's planned output for the year had been 1,200 units before north's order. south's capacity is 1,500 units per year. the costs for producing those 1,200 units follow