Can you tell me what the Extraction Yield % and TDS % is without using the VST app?
It may seem that mathematics has little to do with quality coffee but mathematics is actually a great language to describe things and by understanding the mathematics of brewing it will help you understand how things fit together so you can brew better coffee.
So for the answers…
TDS % = Coffee Solubles/Beverage Mass x 100
TDS % = 2.4g/160g x 100
TDS % = 1.5%
EXT % = Coffee Solubles/Dose x 100
EXT % = 2.4g/12g x 100
EXT % = 20%
If you’d like to improve your understanding of Extraction then sign up for the next Coffee Kaizen Weekend Intensive which is in Berlin on the 28th and 29th of July (http://buytickets.at/coffeekaizen/178653/r/ckext)