open_close.rb

class OrderReport
  def initialize(customer:, total:)
    @customer = customer
    @total = total
  end
end

class Invoice < OrderReport
  def print_out
    puts "Invoice"
    puts @customer
    puts @total
  end
end

class BillOfLading < OrderReport
  def initialize(address:, **args)
    super(**args)
    @address = address
  end

  def print_out
    puts "BOL"
    puts @customer
    puts "Shiping Label..."
    puts @address
  end
end

invoice = Invoice.new(customer: "Google", total: 100)
bill_of_lading = BillOfLading.new(customer: "Yahoo", total: 200, address: "123 Any Street")
invoice.print_out
bill_of_lading.print_out

# Invoice
# Google
# 100
# BOL
# Yahoo
# Shiping Label...
# 123 Any Street