https://www.cnbc.com/2022/05/25/spacexs-starlink-surpasses-400000-subscribers-globally.html

Obviously they are not sharing what it costs them to build a batch of 53 satellites and a new second stage, and refurbish a falcon 9 first stage for each new launch.

There have been four starlink launches all with successful first stage landing just in the month of May.

https://en.wikipedia.org/wiki/List_of_Starlink_launches