A person allows a 10% discount for cash payment from the marked price of a toy and still he makes a 10% gain. What is the cost price of the toy which is marked Rs. 770 ?
A
Rs. 610
B
Rs. 620
C
Rs. 630
D
Rs. 640
Correct Answer: Option C
Explanation
Let's break this down into simple steps, just like an aspirant would in the exam hall.
First, let's find out the actual selling