Trial Balance and Rectification of Errors

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