17. Rectify the following errors:

1. Depreciation provided on machinery ₹4,000 was posted as ₹400.
2. Bad debts written off ₹5,000 were posted as ₹6,000.
3. Discount allowed to a debtor ₹100 on receiving cash from him was posted as ₹60.
4. Goods withdrawn by proprietor for personal use ₹800 were posted as ₹300.
5. Bill receivable for ₹2,000 received from a debtor was posted as ₹3,000.