If the credit side of Trial Balance falls short by Rs. 1,000, what will be its treatment ?

What will be the effect on Trial Balance if a purchase return of Rs. 5,000 has been wrongly posted to the debit of Sales Return Account but correctly entered in the Customer's Account ?

What will be the effect on Trial Balance if Rs. 5,000 received as rent and correctly entered in the cash are not posted to Rent Account ?