A invested $400 in a business after 6 months B invested $200 in the business. End of the year if they got $100 as profit. Find A shares?  Select
A) $ 100	B) $ 75	C) $ 20	D) $ 120	E) $ 80

Rationale: a : b = 400 * 12 : 200 * 6 a : b = 4 : 1 a ' s share = 100 * 4 / 5 = $ 80 answer is e
Answer: E