Suppose you write a book. The printer charges $4 per book to print it, and you spend $5500 on advertising. You sell the book for $15 a copy. How many copies must you sell to break even (total cost equals income for sales)? What is your income (or costs) for that many copies?
you will need to write an equation to do things faster let be x number of copies sold to break even 5500+4x= 15 x 5500= 15x-4x 5500=11x x= 500 you need to sell 500 copies to break even 500 x15= $ 7500
