diff --git a/store.rb b/store.rb
index 3cb712e..e8f328e 100644
--- a/store.rb
+++ b/store.rb
@@ -1 +1,106 @@
 # Yout little input goes here!
+
+require 'rubygems'
+require 'json'
+
+class Store
+	attr_accessor :items
+
+	def initialize items = []
+		@items = items
+		@total_sales = 0
+	end
+
+	def increase_total_sale amount
+		@total_sales += amount
+	end
+
+	def total_sale
+		@total_sales.round(2)
+	end
+
+	def import_items file_name
+		file = File.read(file_name)
+		items = JSON.parse(file)
+
+		@items = items.map { |item| Store::Item.new item }
+	end
+
+	def search(search_by)
+		@items.select { |item| 
+	    	search_by.all? { |k, v| 
+	    		if k == :available
+	    			item.in_store > 0 == v
+    			else
+    				value = item.send(k)
+
+		    		if v.class == String
+		    			v.casecmp(value) == 0
+	    			else
+		    			value == v
+	    			end
+    			end
+			}
+	    }
+	end
+
+	def items_sorted_by sort_by, sort_dir = :asc
+		dir = sort_dir == :asc ? 1 : -1
+		@items.sort { |item1, item2| 
+			(item1.send(sort_by) <=> item2.send(sort_by)) * dir
+		}
+	end
+
+	def categories
+		@items.map { |item| item.category}.uniq
+	end
+
+	def unique_articles_in_category category
+		@items.select { |item| item.category == category}.map { |item| item.name }.uniq
+	end
+
+
+	class Cart
+		attr_accessor :store
+		attr_reader :items
+
+		def initialize store
+			@store = store
+			@items = []
+		end
+
+		def add_item item, count = 1
+			[count, item.in_store].min.times { @items.push(item) }
+		end
+
+		def total_items
+			@items.length
+		end
+
+		def unique_items
+			@items.uniq
+		end
+
+		def total_cost
+			@items.inject(0) { |sum, item| sum + item.price }.round(2)
+		end
+
+		def checkout!
+			@store.increase_total_sale(total_cost)
+			@items.each { |item| item.in_store -= 1 }
+		end
+
+	end
+
+	class Item
+		attr_reader :name, :category, :color, :size, :price
+		attr_accessor :in_store
+
+		def initialize(args)
+			args.each do |k, v|
+				instance_variable_set("@#{k}", v)
+			end
+		end
+	end
+
+end