code: def GetGroupSummaries(alias=None,date_start=None,date_end=None):
          
          if alias is None:  alias = clc.v1.Account.GetAlias()
          payload = {'AccountAlias': alias}
          if date_start is not None:  payload['StartDate'] = date_start
          if date_end is not None:  payload['EndDate'] = date_end
  
          r = clc.v1.API.Call('post','Billing/GetGroupSummaries',payload)
          if int(r['StatusCode']) == 0:
                  return(r['GroupTotals'])
docs: Gets the charges for groups and servers within a given account, and for any date range.
  
          https://t3n.zendesk.com/entries/22423916-GetGroupSummaries
  
          :param alias: short code for a particular account.  If none will use account's default alias
          :param date_start: YYYY-MM-DD string for start date.  If None defaults to start of current month
          :param date_end: YYYY-MM-DD string for end date.  If None defaults to current day of current month