Problem 2.3.24
Kali is asked to write a study guide for a textbook.

For her work, the puclishing company is giving her a choice of a one-time payment of $13,000 or $2,000 plus 10% royalties per copy sold.

(a) If her royalty rate results in a royalty of $3.20 per study guide sold, how many study guides need to be sold for the total income received by Kali to be the same from either choice?
(b) If she expects 10,000 copies of the study guide to be sold, which plan should she choose?

Answer:  (a) 3437.5, (b) royalty