Important Standard Reports in Cost Center Accounting 
Use
You will find a description below of some important reports for Cost Center Accounting (CO-OM-CCA) supplied in the SAP system. Additional information for other reports not described here can be found in the documentation for those reports. Choose
Extras 
Documentation 
from the report in question.
Standard reports are organized into four different libraries.
The 1VK Library contains reports for cost accounting systems based on full costs.
The 1GK Library contains reports for cost accounting systems based on marginal costs. These can be used alongside those in the 1VK Library.
The 1AB library contains reports for varianceanalyses.
The 1RU library contains summarizationreports.
The following reports occupy a special position, since they are not Report Painter reports.