diff --git a/.rspec b/.rspec
new file mode 100644
index 0000000..3d036d9
--- /dev/null
+++ b/.rspec
@@ -0,0 +1 @@
+--format documentation
\ No newline at end of file
diff --git a/lib/item.rb b/lib/item.rb
index 85bb5fd..0f644b0 100644
--- a/lib/item.rb
+++ b/lib/item.rb
@@ -1,3 +1,13 @@
 class Item
+  attr_reader :name,
+              :price
 
+  def initialize(attributes)
+    @name = attributes[:name]
+    @price = float_price(attributes[:price])
+  end
+
+  def float_price(string_price)
+    string_price.delete('$').to_f
+  end  
 end
diff --git a/lib/market.rb b/lib/market.rb
index 0286ac1..62be840 100644
--- a/lib/market.rb
+++ b/lib/market.rb
@@ -1,3 +1,60 @@
+require 'date'
+
 class Market
- 
+  attr_reader :name,
+              :vendors,
+              :date
+
+  def initialize(name, date = Date.today)
+    @name = name
+    @vendors = []
+    @date = date
+  end
+
+  def add_vendor(vendor)
+    @vendors << vendor
+  end
+
+  def vendor_names
+    @vendors.map(&:name)
+  end
+
+  def vendors_that_sell(item)
+    @vendors.select { |vendor| vendor.inventory[item] > 0 }
+  end
+  
+  def sorted_item_list
+    list_items = @vendors.flat_map do |vendor|
+      vendor.inventory.keys.map(&:name)
+    end
+
+    list_items.uniq.sort
+  end
+
+  def total_inventory
+    inventory_list = Hash.new { |hash, key| hash[key] = { quantity: 0, vendors: [] } }
+
+    @vendors.each do |vendor|
+      vendor.inventory.each do |item, quantity|
+        inventory_list[item][:quantity] += quantity
+        inventory_list[item][:vendors] << vendor
+      end
+    end
+
+    inventory_list
+  end
+
+  def overstocked?(item_data)
+    item_data[:quantity] > 50 && item_data[:vendors].length > 1
+  end
+
+  def overstocked_items
+    total_inventory.each_with_object([]) do |(item, data), overstock|
+      overstock << item if overstocked?(data)
+    end   
+  end 
+  
+  def formatted_date
+    @date.strftime("%d/%m/%Y")
+  end
 end
diff --git a/lib/vendor.rb b/lib/vendor.rb
index 6f8cc8b..1ae73b5 100644
--- a/lib/vendor.rb
+++ b/lib/vendor.rb
@@ -1,3 +1,21 @@
 class Vendor
+  attr_reader :name,
+              :inventory
+
+  def initialize(name)
+    @name = name
+    @inventory = Hash.new(0)
+  end
   
+  def check_stock(item)
+    @inventory.has_key?(item) ? @inventory[item] : 0
+  end
+
+  def stock(item, quantity)
+    @inventory[item] += quantity
+  end
+
+  def potential_revenue
+    @inventory.sum { |item, quantity| item.price * quantity}
+  end
 end
diff --git a/spec/item_spec.rb b/spec/item_spec.rb
index e69de29..6731dc9 100644
--- a/spec/item_spec.rb
+++ b/spec/item_spec.rb
@@ -0,0 +1,19 @@
+require './spec/spec_helper'
+
+RSpec.describe Item do
+  before(:each) do
+    @item1 = Item.new({name: 'Peach', price: "$0.75"})
+    @item2 = Item.new({name: 'Tomato', price: '$0.50'})    
+  end
+
+  describe '#item attributes' do
+    it 'exists' do
+      expect(@item1).to be_an_instance_of(Item)
+    end
+
+    it 'has a name and price' do
+      expect(@item1.name).to eq('Peach')
+      expect(@item2.price).to eq(0.5)
+    end
+  end
+end
\ No newline at end of file
diff --git a/spec/market_spec.rb b/spec/market_spec.rb
new file mode 100644
index 0000000..cfae07b
--- /dev/null
+++ b/spec/market_spec.rb
@@ -0,0 +1,85 @@
+require './spec/spec_helper'
+require 'date'
+
+RSpec.describe Market do
+  before(:each) do
+    @market = Market.new("South Pearl Street Farmers Market") 
+    @vendor1 = Vendor.new("Rocky Mountain Fresh")
+    @vendor2 = Vendor.new("Ba-Nom-a-Nom")
+    @vendor3 = Vendor.new("Palisade Peach Shack")
+    @item1 = Item.new({name: 'Peach', price: "$0.75"})
+    @item2 = Item.new({name: 'Tomato', price: "$0.50"})
+    @item3 = Item.new({name: "Peach-Raspberry Nice Cream", price: "$5.30"})
+    @item4 = Item.new({name: "Banana Nice Cream", price: "$4.25"})
+  end
+
+  describe '#market attributes' do
+    it 'exits and has a name' do
+      expect(@market).to be_an_instance_of(Market)
+      expect(@market.name).to eq("South Pearl Street Farmers Market")
+      expect(@market.vendors.length).to eq(0)
+    end
+  end
+
+  describe '#vendors with inventory' do
+    before(:each) do
+      @vendor1.stock(@item1, 35)
+      @vendor1.stock(@item2, 9)
+      @vendor3.stock(@item3, 13)
+      @vendor2.stock(@item4, 50)
+      @vendor3.stock(@item1, 65)      
+      @market.add_vendor(@vendor1)
+      @market.add_vendor(@vendor2)
+      @market.add_vendor(@vendor3)
+    end
+
+    it 'can add vendors' do
+      expect(@market.vendors.length).to eq(3)
+    end
+
+    it 'has a hash of vendors' do
+      expect(@market.vendor_names).to eq (["Rocky Mountain Fresh", "Ba-Nom-a-Nom", "Palisade Peach Shack"])
+    end
+
+    it 'knows which vendors sell which items' do      
+      expect(@market.vendors_that_sell(@item1)).to eq([@vendor1, @vendor3])
+      expect(@market.vendors_that_sell(@item4)).to eq([@vendor2])
+    end
+   
+    it 'return a sorted list of unique items' do
+      expect(@market.sorted_item_list).to eq(["Banana Nice Cream", "Peach", "Peach-Raspberry Nice Cream", "Tomato"])
+    end
+
+    it 'knows total market inventory' do
+      actual_inventory = {
+        @item1 => { quantity: 100, vendors: [@vendor1, @vendor3] },
+        @item2 => { quantity: 9, vendors: [@vendor1] },
+        @item3 => { quantity: 13, vendors: [@vendor3] },
+        @item4 => { quantity: 50, vendors: [@vendor2] }
+      }
+      expect(@market.total_inventory).to eq(actual_inventory)
+    end
+
+    it 'returns overstocked items' do
+      expect(@market.overstocked_items).to eq([@item1])
+    end    
+
+    xit 'knows when not to sell item' do
+      expect(@market.sell(@item2, 25)).to be false
+    end
+
+    xit 'sells the item to reduce stock' do
+      expect(@market.sell(@item1, 40)).to be true      
+      expect(@vendor1.check_stock(@item1)).to eq(0)      
+      expect(@vendor3.check_stock(@item1)).to eq(60)
+    end
+  end
+
+  describe 'date can be any date but will default to current' do
+    it 'returns market creation date' do
+      allow(Date).to receive(:today).and_return(Date.new(1912, 5, 13))
+      market1 = Market.new("Test Market")
+      expect(market1.formatted_date).to eq("13/05/1912")
+    end
+  end
+end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
new file mode 100644
index 0000000..eb37d22
--- /dev/null
+++ b/spec/spec_helper.rb
@@ -0,0 +1,3 @@
+require './lib/item'
+require './lib/vendor'
+require './lib/market'
\ No newline at end of file
diff --git a/spec/vendor_spec.rb b/spec/vendor_spec.rb
new file mode 100644
index 0000000..8f9e99e
--- /dev/null
+++ b/spec/vendor_spec.rb
@@ -0,0 +1,34 @@
+require './spec/spec_helper'
+
+RSpec.describe Vendor do
+  before(:each) do
+    @item1 = Item.new({name: 'Peach', price: "$0.75"})
+    @item2 = Item.new({name: 'Tomato', price: '$0.50'})
+    @vendor = Vendor.new("Rocky Mountain Fresh")
+  end
+
+  describe '#vendor attributes' do
+    it 'exitst and has a name' do
+      expect(@vendor).to be_an_instance_of(Vendor)
+      expect(@vendor.name).to eq("Rocky Mountain Fresh")
+    end
+
+    it 'starts with no inventory' do
+      expect(@vendor.inventory).to eq({})
+      expect(@vendor.check_stock(@item1)).to eq(0)
+    end
+  end
+
+  describe '#inventory process' do
+    it 'adds to inventory' do
+      @vendor.stock(@item1, 30)      
+      expect(@vendor.check_stock(@item1)).to eq(30)
+    end  
+
+    it 'calculates potential revenue' do
+      @vendor.stock(@item1, 30)
+      @vendor.stock(@item2, 20)
+      expect(@vendor.potential_revenue).to eq(32.5)
+    end
+  end
+end