Rectify the following errors:
(i) Credit sales to Mohan ₹ 7,000 were recorded as ₹ 7,200.
(ii) Credit purchases from Rohan ₹ 9,000 were recorded as ₹ 9,900.
(iii) Goods returned to Rakesh ₹ 4,000 were recorded as ₹ 4,040.
(iv) Goods returned from Mahesh ₹ 1,000 were recorded as ₹1,600.