The standard labour time requierd for the production of a certain component has been fixed as 4 hours. An incentive scheme was introduced recently to raise labour productivity. The relevant details of the scheme are as follows:

Four workers A, B, C and D produced 16, 12, 14 and 10 units respectively in a particular week of 48 hours.
The basic wages of all the workers is Rs. 15 per hour.
Calculate the efficiency, incentive bonus, total earnings and labour cost per unit in respect of each of the above four workers.

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Efficiency Below 100% 100% (that is, 4 hrs/unit) Above 100% Incentive as a percentage of basic wages No incentive 10% 1% additional incentive for every 1% increase in efficiency above 100% fractions excluded.