To promote making of toilets for women, an organisation tried to generate awareness through (i) house calls (ii) letters, and (iii) announcements. The cost for each mode per attempt is given below: (i) ₹50 (ii) ₹20 (iii) ₹40 The number of attempts made in three village X, Y and Z are given below: Find the total cost incurred by the organisation for three villages separately, using matrices.