Prices are changed because:

• The price of the fuel increases the cost of delivering. https://oilprice.com/
• Shortage of coffee due to the weather last year, the amount of rain, and more    https://www.barchart.com/futures/quotes/KCH19/futures-prices. Also, you can check the New York stock https://futures.tradingcharts.com/futures/quotes/KC.html?cbase=KC. Talk more about the coffee industry https://es.investing.com/commodities/us-coffee-c