In a parliament election, a political party hired a public relations firm to promote its candidates in three ways telephone, house calls and letters. The cost per contact (in paisa) is given in matrix `A` as `A=[140 200 150]` Telephone House\calls Letters. The number of contacts of each type made in two cities `X` and `Y` is given in the matrix `B` as Telephone House call Letters `B=[1000\ \ \ \ \ \ \ \ \ \ \ \ \ 500\ \ \ \ \ \ \ \ \ \ \ \ \ \ 5000 3000\ \ \ \ \ \ \ \ \ \ 1000\ \ \ \ \ \ \ \ \ \ \ \ 10000]C i t y\ X C i t y\ Y` Find the total amount spent by the party in the two cities. What should one consider before casting his/her vote partys promotional activity or their social activities?