A Classic Mixture Problem

Today's GeoGebra Worksheet can be used to generate numerous different versions of a classic mixture problem.  The unit prices of two different blends of coffee, the total weight of the mixture, and the unit price of the mixture can all be adjusted with sliders.  GeoGebra then calculates the amount of each blend which should be used to obtain the correct amount of revenue.  An interesting connection can be made between the ratio of the blends in the final answer and the position of the unit price of the mixture relative to the unit prices of each of the blends.