Q: Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
Problem: a person distributed 10 % of his income to his 2 children each. he deposited 20 % of his income to his wife ' s account. he donated 10 % of remaining amount to an orphan house. finally he has $ 500. find his total income ?
Options: a. $ 900, b. $ 1000, c. $ 1200, d. $ 1150, e. $ 1500
A:
b