Converting from KB to MB within Query

I'm trying to run the following query:

Get-PublicFolder -identity "\" -recurse | Where {($_.Replicas -match 'EMAIL-UK')} | Get-Publicfolderstatistics | Select-Object Name,Folderpath,TotalItemSize,Itemcount | Export-Csv "c:\UKPublicReplcas.csv" -NoType

The query runs fine but the results of the TotalItemSize is in KB, how can i convert that to MB within the same query?