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In a legislative assembly election, a po...

In a legislative assembly election, a political group hired a public relations firm to promote its candidate in three ways: telephone, house calls, and letters. The cost per contact (in paise) is given in matrix A as
`A=overset("Cost per contact")([(,40,),(,100,),(,50,)]){:("Telephone"),("Housecall"),("Letter"):}`
The number of contacts of each type made in two cities X and Y is given by `B=overset("Telephone Housecall Letter")(" "[(1000,500,5000),(3000,1000,"10,000")]){:(toX),(toY):}`. Find the total amount spent by the group in the two cities X and Y.

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The correct Answer is:
Rs. 3400 and Rs. 7200
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