What's the cmdlet for exporting mailbox sizes including OU

Dears;

I need a cmdlet with exchange power shell that exports mailboxes size and ProhibitSendQuota for a specified OU in csv file and the result be  organized from the large mailbox size to the small i tried the below command but when i export it to csv file it comes with bad data ( displays the display name just random numbers and characters and everything else is not displayed )

get-mailbox -organizationalunit "precast factory" | get-mailboxstatistics | ft Displa
yName, TotalItemSize, ItemCount | export-csv "c:\report.csv"

so please someone provide me the right cmdlet that meets the above request

Thanks in advance