Find the simple interest on $10000 at 4% per annum for 12 months? Choose the correct choice from the following answers.
A) $ 400	B) $ 500	C) $ 650	D) $ 710	E) $ 1000

Rationale: "p = $ 10000 r = 4 % t = 12 / 12 years = 1 year s . i . = p * r * t / 100 = 10000 * 4 * 1 / 100 = $ 400 answer is a"
Answer: A