def self.requires_additional_billable_item(account, billable_type_id)
    # ID | Billable Type
    # 2  | User


    billabable_count = account.billables.find_all_by_billable_type_id(billable_type_id).count

    comparison_count = case billable_type_id
    when 2
      account.users.count
    end

    comparison_count >= billabable_count
  end