Coffee shop project | Statistics homework help

Research what the upcharge is for soy or almond milk for a coffee (i.e. how much more you can sell the coffee for than its dairy milk counterpart). Create two different linear models (one for soy/almond milk and one for regular milk) and, if 20% of the sales of these items were soy/almond milk, how much more money would you make vs. only selling the dairy milk version.