SAP FICO Customization for Standard Reports.
Every project you work will require you to Customize Standard SAP Reports like FBL1N. This Tutorial will help your 3-4 weeks work being done in a matter of hours work.
This Tutorial also covers the following Transaction code
FBL1N Vendor Line Item
FBL3N G/L Line Iten
FBL5N Customer Line Item
FS10N G/l Line Item