2021 NOV.[8] From the following particulars, you are required to work out the earnings of a worker under : (a) straight piece rate system; (b) differential piece rate system; (c) Halsey Premium Plan (50%) bonus; (d) Rowan Plan. Weekly working Hrs. Hourly wage rate Piece rate per unit Normal time taken per piece Normal output per week Actual output for the week 48 Rs. 7.50 Rs. 3.00 20 minutes 120 pieces 150 pieces Differential piece rate- 80% of the piece rate when output is below normal and 120% of piece rate when output is above nor- (Marks 15) mal. Ans. [(a) Rs. 450 (b) Rs. 540 (c) Rs. 367.50 (d) Rs. 374.40]