[Ruby] How to calculate the total amount using the initialize method and class variables

class Fruits
  attr_reader :name, :price #Make it readable
  
  @@sum = 0 #Variable definition
  
  def initialize(name, price) #name as an argument in the initialize method,Receive price
    @name  = name             #Instance variables@define name
    @price = price            #Instance variables@Define price
    @@sum += price            # @@Add the total amount of each fruit to sum
  end
  
  #Fruit name and price
  def cost
    puts "#{name}The price of#{price}It is a circle."
  end

  #Total amount of fruit
  def self.get_sum
    puts "The total price is#{@@sum}It's a yen!"
  end
  
end

#Instance generation
apple  = Fruits.new('Apple', 200)
banana = Fruits.new('banana', 150)
melon  = Fruits.new('melon', 500)

#call
apple.cost
banana.cost
melon.cost
Fruits.get_sum

#Terminal output result

#The price of an apple is 200 yen.
#The price of bananas is 150 yen.
#The price of melon is 500 yen.
#The total price is 850 yen!

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