The solvent table is a reference chart for use in the calculations. You input the value for the solvent in 3rd line down in the Data Inputs section, so it is being used in the calculations.
The values in the solvent table came from a study I came across. The company used the same strength weed (all lab tested) and infused several different types of oils/fats. Then they had all the infusions tested to see how efficient each type of oil/fat was at extracting the THC from the weed. Avacado and butter pull out about 10% more THC than the other oils/fats.
Here is a link to the study.