Proposed Solution

app/controllers/baskets_controller.rb

@@ -29,5 +29,6 @@ def build_goods(basket)
       good = basket.goods.build(name: name, price: price, quantity: quantity, basic_tax: 0, import_tax: 0)
       good.save
     end
+    basket
   end
 end

app/models/good.rb

@@ -1,3 +1,17 @@
 class Good < ApplicationRecord
   belongs_to :basket
+
+  before_save :calulate_tax_update_price
+
+  private
+
+  def calulate_tax_update_price
+    exampt = %w[chocolate book pills]
+    self.basic_tax = (price.to_f.round(2) * 0.1).round(2) unless exampt.any? do |exeption|
+                                                                   name.include?(exeption)
+                                                                 end
+    self.import_tax = (price.to_f.round(2) * 0.05).round(2) if name.include?('imported')
+    fprice = quantity.to_f * (price.to_f.round(2) + basic_tax.to_f.round(2) + import_tax.to_f.round(2))
+    self.final_price = fprice.round(2)
+  end
 end

app/views/baskets/_baskets.html.erb

@@ -1,5 +1,5 @@
-<div>
+<ul>
 <% baskets.each do |basket|%>
-    <a href= <%= basket_path(basket.id)%> > basket <%= basket.id%> </a>
+    <li><a href= <%= basket_path(basket.id)%> > basket <%= basket.id%> </a></li>
     <%end%>
-</div>
+</ul>

app/views/baskets/new.html.erb

@@ -1,2 +1,6 @@
-<h1>Baskets#new</h1>
-<p>Find me in app/views/baskets/new.html.erb</p>
+<div>
+<h5> Upload basket </h5>
+<%= form_tag({:action => :create}, :multipart => true) do %>
+    <%= file_field_tag 'file'%>
+    <%= submit_tag 'submit'%>
+<% end %>

app/views/baskets/show.html.erb

@@ -1,2 +1,2 @@
-<h1>Baskets#show</h1>
-<p>Find me in app/views/baskets/show.html.erb</p>
+<h1>Basket <%[email protected]%></h1>
+<%= @basket.goods.map { |entry| entry} %>