All GL Balance Zero in 1comapny code

Dear ALL

We have many companies in SAP FI  we are working on all company Codes and now we want to remove data in  one of the company with 3 Plant and working with PP Module.

Now our requirement is that we want Zero to  all GL balances.

How should we can all this? we are working in 2 Fiscal years 2013 and 2014. we are posted our data upto 7 period of 2014.

Please suggest your expert opinion how to do all GL Balance Zero in FI and also suggest measure for PP, MM and CO Module.

Thanks in Advance
Regard

KM