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? what is your income for that many (or costs) for that many copies?

Question

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?  what is your income for that many (or costs) for that many copies?

vlery · Answer

Your profit on each book is 15-4=11. 
11x=3500 (x being the number of books sold 
x=318.18, but you can't sell .18 books, so round up to 319

texaschic101 · Answer

5500 + 4b = 15b --- subtract 4b from each side
5500 = 15b - 4b
5500 = 11b
5500/11 = b
500

check..
5500 + 4(500) = 15(500)
5500 + 2000 = 7500
7500 = 7500 (correct)

You would need to sell 500 copies to break even.

Costs for that many copies : 5500 + 4(500) = 5500 + 2000 = 7500

texaschic101 · Answer

oh...and income is also $7500