A farmer expected to harvest \(1800\ kg\) of wheat. After favourable weather conditions, the farmer harvested \(2250\ kg\). The farmer compares the actual harvest with the estimate to understand the increase in production.
(i) Express the actual harvest as a fraction of the estimated harvest in its simplest form.
(ii) Express the actual harvest as a percentage of the estimate.
(iii) Calculate the excess harvest and express it as a percentage of the estimated harvest.
(iv) If the selling price of wheat is \(₹\ 3.8\) per \(kg\), how much additional amount does the farmer earn from the increased harvest?