Production Report

Good morning experts,

My manager asked me to do a production report, like how much we produced only since July 1st. And I have no experience in SAP, where from I get this informations and numbers? Like:

1- Working in process, Beginning, for example, July 1st

2- Productions started through July.

3- The working in process in Ending of July 31.

So I can calculate the production that occurred only in July. Can anyone of you help me?