Question 4: Calculation of earnings per week

From the following particulars work out the earnings for the week of a worker under

(a) Straight Piece Rate

(b) Differential Piece Rate

(c) Halsey Premium System

(d) Rowan System

Number of working hours per week 48

Wages per hour Rs. 3.75

Normal time per piece 20 Min

Normal output per week 120 pieces

Actual output for the week 150 pieces

Differential piece rate 80% of the piece rate when output is below standard and 120% above standard.