The following information pertains to the three product lines for next year: Economy Standard Deluxe Units to be produced 10,800 5,800 2,800 Orders to be shipped 1,080 580 280 Number of parts per unit 18 23 33 Machine hours per unit 9 11 13 Labor hours per unit 10 10 10 What is Barnett's pool rate for the material-insertion activity? Multiple Choice $5.91 per part. $26.87 per part. $8.46 per labor hour. $9.00 per part. None of the answers is correct