In a local​ election, a group hired a public relations firm to promote its candidate in three​ ways: telephone​ calls, house​ calls, and letters. The cost per contact is given in matrix​ M, and the number of contacts of each type made in two adjacent cities is given in matrix N. Complete parts​ (A) through​ (D) below.

 In a local​ election, a group hired a public relations firm to promote its candidate in three​ ways: telephone​ calls, house​ calls, and letters. The cost per contact is given in matrix​ M, and the number of contacts of each type made in two adjacent cities is given in matrix N. Complete parts​ (A) through​ (D) below.

 

(C) If either product MN or NM has a meaningful​ interpretation, find the product and label its rows and columns. What do the entries​ represent?

 

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