'{0:N}' -f $number
Use this method to add commas to your numbers for easier reading.
PS C:\> $number = 1234567890
>> '{0:N}' -f $number
1,234,567,890.00
'{0:N}' -f $number
DetailsPS C:\> $number = 1234567890
>> '{0:N}' -f $number
1,234,567,890.00