In a factory Wages are paid on a weekly basis [40 hours per week] at a guaranteed hourly rate of 10. A study has revealed that standard output per hour 40 units. During a particular week, A produced 1,400 units and B Produced 1,800 units. Calculate the Earnings and Labour Cost per 100 units for each of the two workers under : () Piece work with a guaranteed weekly wage plan, (ii) Halsey Premium Plan, and (iii) Rowan Premium Plan