diff --git a/app/controllers/api/v1/diaper_calculators_controller.rb b/app/controllers/api/v1/diaper_calculators_controller.rb
index 2b2bd06a9..e2a3b23f0 100644
--- a/app/controllers/api/v1/diaper_calculators_controller.rb
+++ b/app/controllers/api/v1/diaper_calculators_controller.rb
@@ -10,6 +10,12 @@ class DiaperCalculatorsController < ApplicationController
         { name: 'to_be_used_diapers_amount', result: 0 }
       ].freeze
 
+      LOW = 'LOW'
+      MEDIUM = 'MEDIUM'
+      HIGH = 'HIGH'
+
+      DIAPER_TITLE = 'diaper'
+
       def create
         result = diapers_service_handler(childs_age).calculate!
         diapers_be_used = diapers_correct_form(result.to_be_used_diapers_amount)
@@ -36,6 +42,20 @@ def diapers_service_handler(age)
       def childs_age
         params[:childs_age].to_i
       end
+
+      def diaper
+        @diaper ||= Product.find_by(title: DIAPER_TITLE)
+      end
+
+      def default_price
+        ProductPrice.find_by(category: MEDIUM, product: diaper)
+      end
+
+      def product_price
+        selected_price = ProductPrice.find_by(category: params[:price_id],
+                                              product: diaper)
+        selected_price || default_price
+      end
     end
   end
 end
diff --git a/app/javascript/ajax/calculate_result_button.js b/app/javascript/ajax/calculate_result_button.js
index adf1a0b4f..19288f382 100644
--- a/app/javascript/ajax/calculate_result_button.js
+++ b/app/javascript/ajax/calculate_result_button.js
@@ -40,7 +40,8 @@ $(document).on('turbolinks:load', function() {
     }
 
     const formData = {
-      childs_age: $("#childs_years").val() * 12 + months
+      childs_age: $("#childs_years").val() * 12 + months,
+      price_id: $("#product_category").selectedIndex
     }
 
     $.ajax({
diff --git a/app/views/calculators/calculator.html.slim b/app/views/calculators/calculator.html.slim
index 40312b95a..ae30ee1c4 100644
--- a/app/views/calculators/calculator.html.slim
+++ b/app/views/calculators/calculator.html.slim
@@ -25,14 +25,17 @@
             - (0..6).each do |month|
               option value = month
                 = month
-          - if FeatureFlag.get('feature_budget_category').active? 
+
+          - if FeatureFlag.get('feature_budget_category').active?
             p.form-a
               = t '.form_price'
-              select.custom-select#childs_months [required]
-                - ([(t('.form.budgetary')), (t('.form.medium')), (t('.form.premium'))]).each do |price|
-                  option value = price
-                    = price
-
+              select.custom-select#product_category [required]
+                option
+                  =t('calculators.calculator.form.budgetary')
+                option selected=""
+                  =t('calculators.calculator.form.medium')
+                option
+                  =t('calculators.calculator.form.premium')
           = form.text_field :baby_weight, placeholder:t('.form.baby_weight_label'), class:"form-input d-none"
           = form.text_field :diapers_per_day, placeholder: "Diapers per day", class:"form-input d-none"
         = render_email_receiver_checkbox
diff --git a/db/seeds.rb b/db/seeds.rb
index 211cdab8f..0c35c2172 100644
--- a/db/seeds.rb
+++ b/db/seeds.rb
@@ -38,19 +38,19 @@
   product_type: hygiene_type
 )
 
-budgetary = ProductPrice.create!(
+ProductPrice.create!(
   price: 4.99,
   category: 0,
   product: diaper
 )
 
-medium = ProductPrice.create!(
+ProductPrice.create!(
   price: 6.36,
   category: 1,
   product: diaper
 )
 
-premium = ProductPrice.create!(
+ProductPrice.create!(
   price: 8.21,
   category: 2,
   product: diaper
diff --git a/spec/controllers/diaper_calculators_spec.rb b/spec/controllers/diaper_calculators_spec.rb
index 7192af6b3..c1064074e 100644
--- a/spec/controllers/diaper_calculators_spec.rb
+++ b/spec/controllers/diaper_calculators_spec.rb
@@ -22,9 +22,67 @@
       before do
         get :create
       end
+
       it 'renders expected result' do
         expect(response.body).to eq(expected.to_json)
       end
     end
   end
+
+  describe '#product_price' do
+    context 'when get awaited value' do
+      it 'first diaper price category returned' do
+        low = create(:product_price, :LOW)
+        controller.params[:price_id] = 0
+        result = controller.send(:product_price)
+        expect(result).not_to eq(nil)
+        expect(result).to eq(low)
+      end
+
+      it 'default diaper price category returned' do
+        medium = create(:product_price, :MEDIUM)
+
+        controller.params[:price_id] = 1
+        result = controller.send(:product_price)
+        expect(result).not_to eq(nil)
+        expect(result).to eq(medium)
+      end
+
+      it 'last diaper price category returned' do
+        high = create(:product_price, :HIGH)
+
+        controller.params[:price_id] = 2
+        result = controller.send(:product_price)
+        expect(result).not_to eq(nil)
+        expect(result).to eq(high)
+      end
+    end
+    context 'when get unawaited value' do
+      it 'get unawaited number' do
+        medium = create(:product_price, :MEDIUM)
+
+        controller.params[:price_id] = -1
+        result = controller.send(:product_price)
+        expect(result).not_to eq(nil)
+        expect(result).to eq(medium)
+      end
+      it 'get nil' do
+        medium = create(:product_price, :MEDIUM)
+
+        controller.params[:price_id] = nil
+        result = controller.send(:product_price)
+        expect(result).not_to eq(nil)
+        expect(result).to eq(medium)
+      end
+    end
+  end
+
+  describe '#childs_age' do
+    context 'when default value' do
+      it 'child`s age selected' do
+        controller.params[:childs_age] = 1
+        expect(controller.send(:childs_age)).to eq(1)
+      end
+    end
+  end
 end
diff --git a/spec/factories/product_price.rb b/spec/factories/product_price.rb
new file mode 100644
index 000000000..690b1abd4
--- /dev/null
+++ b/spec/factories/product_price.rb
@@ -0,0 +1,17 @@
+FactoryBot.define do
+  factory :product_price do
+    association :product, title: "diaper", id: 1
+    trait :LOW do
+      category { :LOW }
+      price { 4.99 }
+    end
+    trait :MEDIUM do
+      category { :MEDIUM }
+      price { 6.36 }
+    end
+    trait :HIGH do
+      category { :HIGH }
+      price { 8.21 }
+    end
+  end
+end
diff --git a/spec/factories/product_types.rb b/spec/factories/product_types.rb
index 6426e7d8a..485e44534 100644
--- a/spec/factories/product_types.rb
+++ b/spec/factories/product_types.rb
@@ -2,6 +2,6 @@
 
 FactoryBot.define do
   factory :product_type do
-    title { 'Title' }
+    title { 'hygiene' }
   end
 end
diff --git a/spec/factories/products.rb b/spec/factories/products.rb
index 94e0a1058..1df30697e 100644
--- a/spec/factories/products.rb
+++ b/spec/factories/products.rb
@@ -2,6 +2,7 @@
 
 FactoryBot.define do
   factory :product do
-    title { 'Diaper' }
+    title { 'diaper' }
+    association :product_type, title: "hygiene", id: 1
   end
 end
diff --git a/spec/features/product_category_spec.rb b/spec/features/product_category_spec.rb
new file mode 100644
index 000000000..c0d3aeb79
--- /dev/null
+++ b/spec/features/product_category_spec.rb
@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+BUDGETARY_OPTION = 'budgetary'
+MEDIUM_OPTION = 'medium'
+PREMIUM_OPTION = 'premium'
+
+describe 'product category dropdown list', js: true do
+  let(:calculator) { create(:calculator) }
+  before do
+    FeatureFlag.get('feature_budget_category').activate
+    visit '/calculator'
+    find(:select, 'product_category')
+    has_select?('product_category', with_options: [BUDGETARY_OPTION, MEDIUM_OPTION, PREMIUM_OPTION])
+  end
+
+  it 'default product category' do
+    expect(page).to have_select('product_category', selected: MEDIUM_OPTION)
+  end
+
+  it 'custom product category selected' do
+    select(BUDGETARY_OPTION, from: 'product_category')
+    expect(page).to have_select('product_category', selected: BUDGETARY_OPTION)
+  end
+end
diff --git a/spec/models/product_price_spec.rb b/spec/models/product_price_spec.rb
new file mode 100644
index 000000000..3b0c3a5e7
--- /dev/null
+++ b/spec/models/product_price_spec.rb
@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe Product, type: :model do
+  describe 'factory' do
+    context 'product prices factory not nil' do
+      it 'low' do
+        expect(create(:product_price, :LOW)).not_to eq(nil)
+      end
+      it 'medium' do
+        expect(create(:product_price, :MEDIUM)).not_to eq(nil)
+      end
+      it 'high' do
+        expect(create(:product_price, :HIGH)).not_to eq(nil)
+      end
+    end
+  end
+end