Status Updates From Introduction to Islamic Eco...

This book is full of math errors. I wonder why

part about indexation was pretty okay

: The higher price reduces consumer surplus in comparison to the
perfect market model, and the difference is transferred to the monopolist.

another technical mistake

"Opportunity cost is a pure economic phenomenon and does not include moral or social dimensions. In Islam, this is not the case."

What do these two sentences even mean?

"Individuals behave rationally. This means that individuals indeed act
in their own interest as if they are making decisions that will maximize
their utility."

Welp... There goes the credibility of the book