Turkey hill motor homes currently sells 1,200 class a motor homes, 2,600 class c motor homes, and 4,000 pop-up trailers each year. it is considering adding a mid-range camper and expects that if it does so the firm can sell 1,500 of them. however, if the new camper is added, the firm expects its class a sales to decline by 10 percent while the class c camper sales decline to 2,100 units. the sales of pop-ups will not be affected. class a motor homes sell for an average of $162,000 each. class c homes are priced at $59,500 and the pop-ups sell for $5,500 each. the new mid-range camper will sell for $32,900. what is the erosion cost?

Employees at a library check out books to patrons. books have an isbn and a name. the library sometimes has multiple copies of the same book. books have one or more authors. a patron is an individual who has an active (non-expired) library card. for each library card, we store the person's first and last names and their address. for each employee, we store their employee id, current salary, first and last name and their address. we also store the employee id of their current manager. each time we check out a book to a patron we need to store the date of the transaction, the employee who checked out the book to the patron, and the library card of the patron. some employees have library cards. if an employee patron turns in a book late, the fine that they pay is a percentage of their salary. some employees are authors who have library cards—they are allowed to check out as many books as they like.