Two sisters is a partnership that owns and operates a farm. during the current year, the partnership raised and harvested hay at a cost of $20,000. it then traded half the hay for quarter horse breeding stock—young horses worth $30,000. two sisters fed the remainder of the hay to the horses, which were worth $50,000 at the end of the year. how much income does the partnership have from these transactions during the current year?

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.