The World Bank spot prices of tea in Sri Lanka and Kenia over the past four years from the link below shows that that the price of tea has fluctuated a great deal during this period. Between December 2014 and July 2015 the price increased by 64% in Mombasa, while in the same time the price decreased by 11% in Colombo. Explain using economic analysis the changes in the prices of Sri Lankan and Kenian tea over the period and why the prices fluctuations have been so different.

Link: http://www.worldbank.org/en/research/commodity-markets