Alfred buys an old scooter for $4700 and spends $800 on its repairs. If he sells the scooter for $5800, his gain percent is?
Pick: A) 5.45 % B) 6.23 % C) 7 % D) 8.12 % E) 10 %

Rationale: "c . p . = 4700 + 800 = $ 5500 s . p . = $ 5800 gain = 5800 - 5500 = $ 300 gain % = 300 / 5500 * 100 = 5.45 % answer is a"
Answer: A