I'm not sure if they are stored or they are always calculated. If yes they will be within the qvw-meta-data. You could try it with the export from menu --> export --> document layout and read this xml-file into qv again.
It mustn't be necessary stored anywhere if it's always calculated on-the-fly and you could make these calculations yourself within the qvw with chart-tables with systemfields like $Table or $Field and calculations over $Row and fieldvaluecount and so on. Have a look in the comments and tools here what is mentioned above:
