Exchange 2010 powershell public folder size statistic to Excel file

I am looking for a powershell command syntax to get a list of public folder statistics into excel sorted by folder size.
i found this syntax
its only reporting 100 top items and suggests adding a parameter "-ResultSize Unlimited" for all folders.
1. I am not sure where to add unlimited.
2. I'd like size reported in megabites if possible and

$script:CSV = @()
 
function AddCSV([string]$sName,[string]$sSize)
{
      $logentry = new-Object -typename System.Object
      $logentry | add-Member -memberType noteProperty -name Name -Value $sName
      $logentry | add-Member -memberType noteProperty -name Size -Value $sSize
      $script:CSV += $logentry
}
 
foreach ( $pubflr in Get-PublicFolderStatistics -Server "server>")
{
AddCSV $pubflr.AdminDisplayName $pubflr.TotalItemSize
}  
 
$CSV | export-csv -Path "g:\PubFlrs.log"