extractor.rb

def print_bill
  outstanding = 0.0

  #print banner
  puts "*************************"
  puts "******Customer Owes******"
  puts "*************************"

  # calculate outstanding
  @orders.each do |order|
    oustanding += order.amount
  end

  #print details
  puts "name: #{@name}"
  puts "amount: #{outstanding}"

end

def calculate_outstanding
  @order.inject(0.0){ |result, order| result + order.amount] }
end

def print_banner
  puts "*************************"
  puts "******Customer Owes******"
  puts "*************************"
end

def print_outstanding(outstanding)
  puts "name: #{@name}"
  puts "amount: #{outstanding}"
end

def print_bill
  print_banner
  outstanding = calculate_oustanding
  print_outstanding(outstanding)
end