cashier.rb

class Product
	@@all = []

	def initialize (item, price)
		@item = item
		@price = price
	end

	def price
		@price
	end

	def name
		@item
	end

	def self.create(name, price)
		product = Product.new(name, price)
		@@all << product
		product
	end

	def self.all
		@@all
	end
end

def inventory
	puts "Enter product name:"
	name = gets.chomp

	puts "Enter product price:"
	price = gets.chomp

	Product.create(name, price)

	puts "Would you like to add another item?"
	answer = gets.chomp.downcase
	if answer == "yes"
		inventory
	else
		total
	end
end

def total
	amount_due = 0
	Product.all.each do |product|
		puts "How many #{product.name}s would the customer like?"
		quantity = gets.chomp.to_f
		item_total = quantity * product.price.to_f
		$amount_due = amount_due + item_total
	end
end

def transaction
	puts "The customer owes you $#{"%.2f" % $amount_due}."
	puts "How much money did the customer give you?"
	tendered = gets.chomp.to_f
	if tendered >= $amount_due
		change = tendered-$amount_due
		change = change.to_f
		puts "Please return $#{"%.2f" % change} in change to the customer."
	else
		"The customer did not give you enough cash."
	end
end

inventory
transaction