The owner of a furniture shop charges his customer 20% more than the cost price. If a customer paid Rs. 8400 for a computer table, then what was the cost price of the computer table?	Choose the correct choice from the following answers:
A) rs . 6725  B) rs . 6727  C) rs . 6908  D) rs . 6725  E) rs . 7000

Rationale: "cp = sp * ( 100 / ( 100 + profit % ) ) = 8400 ( 100 / 120 ) = rs . 7000 . answer : e"
Answer: E