Of course not. I am sorry to see you read my post so carelessly.
I stated quite clearly that the calculation was easy and did not mention any book in that context. If you made that calculation at least once in your life, then that alone, even without reading, would preclude some of the silly things in your post.
I suggested that you may want to read something on the subject before arriving at conclusions and making claims. At the present time, almost every statement you make is unamnbiguously wrong and simply screams that you have not a clue about matters on which you pass judgment.
Have a good day.
Fairly condescending considering you have absolutely no clue about what you are talking about.
My guess is numbers cruncher at a bank.
Your calculation is sophomoric. It attempts to rationalize 40% interest rates due to the banks making poor judgements on credit risk customers. The reality is that they should be out of business, excepting the taxpayers bailing them out.