Accumulated average purchasing price report

Dear Gurus,

for fiscal reasons I need to explain the moving price for purchased materials over a period.

I look for a report where for each purchased material (ZROH) there is all the receiving documents with price and quantities, forming the average price I have at the end of the period for that material.

I found some reports where I have the analysis for 1 item only, but no one with a overall analysis.

thanks for your help

Mauro