From a puzzle and logical perspective, we do try to construct general ideas, interesting findings and solutions on the relationships between macroeconomical variables. In this book we have original findings about the geometry and the logic of the curves as one can easily get this in our book. Rather than lust deriving formulas, we look back on the logical story of the derivation and we decompose the formulas which we derived and try to give readers an insight to analyze a formula and to see what different parts of a formula represent. Rather than sticking to memorization, laws, strict theories, ext. we should learn, teach and speak the language of puzzles, logic and geometry.