An author received $0.80 in royalties for each of the first 100,000 copies of her book sold, and $0.50 in royalties for each additional copy sold. If she received a total of $260,000 in royalties, how many copies of her book were sold?	Choose the correct choice from the following answers.
A) 130,000 B) 300,000 C) 380,000 D) 400,000 E) 460,000
Total royalties for first 100.000 books = .8*100,000= 80,000   Total royalties for the rest of the books = 260,000-80,000 = 180,000   Remaining books = 180,000/0.5 = 360,000   Total books = 360,000+100,000 = 460,000 Answer 460,000
<result>E</result>
An author received $0.80 in royalties for each of the first 100,000 copies of her book sold, and $0.50 in royalties for each additional copy sold. If she received a total of $260,000 in royalties, how many copies of her book were sold?