Paul the Publisher is thinking about publishing a new textbook on Microeconomics by Edwina Economist.The costs of supplying the book are $10 to print each copy of the book, a cost to distribute the book to bookstores of $1 for each copy, and then for each copy sold Edwina must be paid $5.What is the opportunity to Paul from printing and distributing 1000 copies of the book, if he expects that every copy will be sold?