A department employs 3 types of workers: laborers earning $5 per hour, machine operators earning $9 per hour and maintenance workers earning $16 per hour. For a certain job over 2 time periods, the following data were collected
Type of Employee Number of Labor period #1 Number of Labor for period # 2
Laborer 20 16
Machine Operator 12 16
Maintenance Worker 6 9
Output increased by 20% in period #2 compared to period #1.
a) Compute the Labor productivity ratio for each period.
b) Compute the percent change in the labor ratios