In the data file, refer to the "Force sensor calibration" tab for instructions. The data curve in this tab was generated by a force sensor when more and more weights were added to it$,$ follow the instructions next to the data plot to read value difference between two data points.

Please read the force value difference between the peak in the $4060$ seconds range to the peak in the $6080$ seconds range, and report the absolute value of the difference $($in unit of Newton$)$ reading below.