Two farmers Mukul and Vipul cultivates only three crops potato, tomato and wheat. The annual sale of 2010, 2011 are given below : $$Sale 2010 = \begin{bmatrix} Potato & \quad Tomato & \quad Wheat \\ 20000 & \quad 15000 & \quad 80000 & \quad Mukul \\ 30000 & \quad 10000 & \quad 90000 & \quad Vipul \end{bmatrix}$$ $$Sale 2011 = \begin{bmatrix} Potato & \quad Tomato & \quad Wheat \\ 30000 & \quad 15000 & \quad 60000 & \quad Mukul \\ 20000 & \quad 20000 & \quad 50000 & \quad Vipul \end{bmatrix}$$

Question

(i) Find the combined sales of 2010 and 2011 for each farmer in each crop. (ii) If the profit on sale of potato is 13%, tomato is 5% and wheat is 12% . Compute the profit for each farmer for each crop sold in 2011. (iii) Give suggestions to the farmers keeping ' save environment ' in mind.