Alfred buys an old scooter for $4400 and spends $800 on its repairs. If he sells the scooter for $5800, his gain percent is?  Choose the correct choice from the following answers.
A) 5.45 %  B) 6.23 %  C) 7 %  D) 8.12 %  E) 11.5 %

Rationale: "c . p . = 4400 + 800 = $ 5200 s . p . = $ 5800 gain = 5800 - 5200 = $ 600 gain % = 600 / 5200 * 100 = 11.5 % answer is e"
Answer: E