use the example given in the focus problem.) Tell me about your item and the 3 different ways to buy it. Include the fixed cost (i.e. the cost of the e-reader, which stays the same no matter how many books you read) and the variable cost (the cost of the books, which gets more expensive the more books you purchase).

Suppose you are an avid reader who always buys a book as soon as it is published; hence you tend to buy newly released hardcovers. You have been considering purchasing an e-book reader for some time now, but you are not sure which one, if any, to buy. You know that the Kindle and Nook are popular choices, but you are open to other possibilities as well. You would like to make a good financial decision based on how many books you read and the relative price of buying hard- cover copies versus electronic copies of the books. Research two different e-readers and find the initial costs of the devices. Then determine a typical cost for a newly released hardcover book from a local bookstore, and find the price for the electronic version of each of your chosen e-readers. Write an equation to model the price for each reader, including the initial cost of the device and the cost of the books, and an equation to model the cost of continuing to read hard copies of books. Use Excel to numerically compare the prices of the different options depending on the number of books you read. Include a graph of all of your models and use them to compare the prices of the different options de pending on the number of books read. Lastly, confirm your numeric and graphic solutions by solving equations using your cost models. How many books would you need to read to justify the pur- chase? In other words... WHEN IS IT WORTH IT? Suppose you are an avid reader who always buys a book as soon as it is published; hence you tend to buy newly released hardcovers. You have been considering purchasing an e-book reader for some time now, but you are not sure which one, if any, to buy. You know that the Kindle and Nook are popular choices, but you are open to other possibilities as well. You would like to make a good financial decision based on how many books you read and the relative price of buying hard- cover copies versus electronic copies of the books. Research two different e-readers and find the initial costs of the devices. Then determine a typical cost for a newly released hardcover book from a local bookstore, and find the price for the electronic version of each of your chosen e-readers. Write an equation to model the price for each reader, including the initial cost of the device and the cost of the books, and an equation to model the cost of continuing to read hard copies of books. Use Excel to numerically compare the prices of the different options depending on the number of books you read. Include a graph of all of your models and use them to compare the prices of the different options de pending on the number of books read. Lastly, confirm your numeric and graphic solutions by solving equations using your cost models. How many books would you need to read to justify the pur- chase? In other words... WHEN IS IT WORTH IT