## In 2010, Musa got 750 bags of coffee from his shamba. In 2011 his yield dropped by 30% due to drought and in 2012 his yield rose by 15% over that of 2011. A bag of coffee weighs 55kg and Musa was paid sh. 7900 per tonne in 2010. Thereafter the price per tonne increased each year by 10%. Find his earning from coffee for each of the three years. Hence, find his total income from coffee for three years.

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