Help with rectification of errors problem

RishebhKumar (Studying) (128 Points)

11 May 2012  

Q2. Bills Receivable from Mr. A of Rs.500 was posted to the credit of the Bills Payable Account and also credited to A account.?(before prop. of trial balance)

Ans."To wrong posting on Rs. 500" in the debit of bills payable account and also "To omission of posting on Rs. 500 in the debit of Bills Receivable account"

Explain me the Question and also the wrong part (with the help of ledger first the wrong part then the right part)

thanks in Advance

Note:  I am a beginner in Accounts so plz help me