Done

app/application.rb

@@ -0,0 +1,26 @@
+class Application
+    @@items = []
+
+    def call(env)
+      resp = Rack::Response.new
+      req = Rack::Request.new(env)
+
+      if req.path.match(/items/)
+        item_name = req.path.split("/items/").last
+
+        item = @@items.find{|i| i.name == item_name}
+
+        if item.nil? #IF a user requests an item that is not available
+          resp.write "Item not found"
+          resp.status = 400
+        else
+          resp.write item.price #If user requests '/items/<Item Name>' it returns the price of that item.
+        end
+      else
+        resp.write "Route not found" 
+        resp.status = 404
+      end
+
+      resp.finish
+    end
+end

app/item.rb

@@ -5,4 +5,5 @@ def initialize(name,price)
     @name = name
     @price = price
   end
+
 end