Suppose that a contractor employs carpenters, bricklayers, and plumbers, working three shifts per day. The number of labor-hours employed in each of the shifts is summarized in the following matrix:

Labor in shift 1 costs $20 per hour, in shift 2 $30 per hour, and in shift 3 $40 per hour. Use matrix multiplication to compute the dollar amount spent on each type of labor.

Transcribed Image Text:

Shift 1 2 3 50 20 10 Carpenters Bricklayers 30 30 15 Plumbers 20 20 5.