A present value of a machine is $40000. Its value depletiation rate is 5% per annum then find the machine value after 2 years?
Choose the most appropriate option:
A) $ 36540  B) $ 36100  C) $ 29580  D) $ 31256  E) $ 41250

Rationale: "p = $ 40000 r = 5 % t = 2 years machine value after 3 years = p / ( 1 - r / 100 ) ^ t = 40000 * 19 / 20 * 19 / 20 * 19 / 20 = $ 36100 answer is b"
Answer: B