This example is from Interest Rate Models: an Infinite Dimensional Stochastic Analysis Perspective by Carmona, René, Tehranchi, M R.
I am wondering if the calculation is correct?, he says approximately, but I am wondering if you agree with me in that the calculation of the discount is to be calculated like this: ?
$100000-100000/(1+r) = 100 000 *[1- 1/(1+0.06/4)]=1477.83$
And that he he pays at the start: $100000/(1+0,06/4)=98522.17$. Or shall the calculations be done as in the example? Here is the example: