A worker, whose day-work wages are Rs. 25 per hour, received production bonus under the Rowan Scheme. He carried out the following work in a 48-hour week:
Job No. 2 was carried out on a machine running at 90 per cent efficiency and an extra allowance of 1/9th of actual time was given to compensate the worker.

4 hours were lost due to power cut. Calculate the earnings of the worker, clearly stating your assumptions for the treatment given by you for the hours lost due to power-cut.

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Job 1-1,500 items at 4 hours per 1,000 Job 2-1,800 items at 3 hours per 1,000 Job 3-9,000 items at 6 hours per 1,000 Job 4 1,500 items for which no 'standard time' was fixed and it was arranged that the worker would be paid a bonus time of 25 per cent. Actual time on the job was 4 hours. Job 5-2,000 items at 8 hours per 1,000, this job was estimated to be half-finished.