The standard production in Hypothetical Ltd is 20 units per hour For the first week of April, a workers' record (working 8 hours per day) is as follows: Monday 140 units Tuesday 160 units Friday 200 units Wednesday 175 units Thursday 180 units Compute the workers daily earnings. The effective hourly rate and the labour cost per unit under the Taylor Differential Piece Rate System with piece rates are as specified below: $2 per unit below standard; $ 2.40 at standard and upto 20 per cent above standard, and $3 per unit when daily output exceeds 20 per cent above standard.