diff --git a/.rspec b/.rspec
new file mode 100644
index 0000000..210a1d6
--- /dev/null
+++ b/.rspec
@@ -0,0 +1,2 @@
+--format documentation
+--color
\ No newline at end of file
diff --git a/lib/item.rb b/lib/item.rb
index 85bb5fd..906c24d 100644
--- a/lib/item.rb
+++ b/lib/item.rb
@@ -1,3 +1,8 @@
 class Item
+    attr_reader :name, :price
 
+    def initialize(info)
+        @name = info[:name]
+        @price = info[:price]
+    end
 end
diff --git a/lib/market.rb b/lib/market.rb
index 0286ac1..69a8a26 100644
--- a/lib/market.rb
+++ b/lib/market.rb
@@ -1,3 +1,42 @@
 class Market
- 
+    attr_reader :name, :vendors
+
+    def initialize(name)
+        @name = name
+        @vendors = ([])
+    end
+
+    def add_vendor(vendor)
+        @vendors << vendor
+    end
+
+    def vendor_names
+        @vendors.map { |vendor| vendor.name }
+    end
+
+    def vendors_that_sell(item)
+        @vendors.select do |vendor|
+            vendor.inventory.include?(item)
+        end
+    end
+
+    def sorted_item_list
+        vendors.flat_map { |vendor| vendor.inventory.keys.map(&:name)}.uniq.sort
+    end
+
+    def total_inventory
+        all_inventory = {}
+
+        @vendors.each do |vendor|
+            vendor.inventory.each do |item, quantity|
+                if all_inventory[item]
+                    all_inventory[item][:quantity] += quantity
+                    all_inventory[item][:vendors] << vendor.name unless all_inventory[item][:vendors].include?(vendor.name)
+                else
+                    all_inventory[item] = {quantity: quantity, vendors: [vendor.name]}
+                end
+            end
+        end
+    all_inventory
+    end
 end
diff --git a/lib/vendor.rb b/lib/vendor.rb
index 6f8cc8b..9384de4 100644
--- a/lib/vendor.rb
+++ b/lib/vendor.rb
@@ -1,3 +1,21 @@
 class Vendor
-  
+    attr_reader :name, :inventory
+    def initialize(name)
+        @inventory = {}
+        @name = name
+    end
+
+    def check_stock(item)
+        @inventory[item] || 0 
+    end
+
+    def stock(item, quantity)
+        @inventory[item] = (@inventory[item] || 0 )+ quantity
+    end
+
+    def potential_revenue
+        @inventory.sum do |item,quantity|
+            item.price.gsub('$', '').to_f * quantity
+        end.round(2)
+    end
 end
diff --git a/spec/item_spec.rb b/spec/item_spec.rb
index e69de29..68fc13d 100644
--- a/spec/item_spec.rb
+++ b/spec/item_spec.rb
@@ -0,0 +1,23 @@
+require '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
+
+    it '#exists' do 
+        expect(@item1).to be_an_instance_of (Item)
+        expect(@item2).to be_an_instance_of (Item)
+    end
+
+    it 'has a name' do
+        expect(@item1.name).to eq('Peach')
+        expect(@item2.name).to eq('Tomato')
+    end
+
+    it 'has a price' do
+        expect(@item1.price).to eq('$0.75')
+        expect(@item2.price).to eq('$0.50')
+    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..f726f17
--- /dev/null
+++ b/spec/market_spec.rb
@@ -0,0 +1,65 @@
+require 'spec_helper'
+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
+
+    it '#exists' do 
+        expect(@market).to be_an_instance_of(Market)
+    end
+
+    it '#has a name' do
+        expect(@market.name).to eq ("South Pearl Street Farmers Market")
+    end
+
+    it '#has no vendors' do
+        expect(@market.vendors).to eq([])
+    end
+
+    it '#can have vendors' do 
+        @market.add_vendor(@vendor1)    
+        @market.add_vendor(@vendor2)    
+        @market.add_vendor(@vendor3)
+        expect(@market.vendors).to eq([@vendor1, @vendor2, @vendor3])
+    end
+
+    it '#can tell vendor names' do
+        @market.add_vendor(@vendor1)    
+        @market.add_vendor(@vendor2)    
+        @market.add_vendor(@vendor3)
+        expect(@market.vendor_names).to eq(["Rocky Mountain Fresh", "Ba-Nom-a-Nom", "Palisade Peach Shack"])
+    end
+
+    it '#can show vendors that sell an item' do
+        @vendor1.stock(@item1, 35)    
+        @vendor1.stock(@item2, 7) 
+        @vendor2.stock(@item4, 50)    
+        @vendor2.stock(@item3, 25)
+        @vendor3.stock(@item1, 65)  
+        @market.add_vendor(@vendor1)    
+        @market.add_vendor(@vendor2)    
+        @market.add_vendor(@vendor3)
+        expect(@market.vendors_that_sell(@item1)).to eq([@vendor1, @vendor3])
+        expect(@market.vendors_that_sell(@item4)).to eq([@vendor2])
+    end
+
+    it '#can show all items in inventory' do
+        @vendor1.stock(@item1, 35)    
+        @vendor1.stock(@item2, 7) 
+        @vendor2.stock(@item4, 50)    
+        @vendor2.stock(@item3, 25)
+        @vendor3.stock(@item1, 65)  
+        @market.add_vendor(@vendor1)    
+        @market.add_vendor(@vendor2)    
+        @market.add_vendor(@vendor3)
+        expect(@market.sorted_item_list).to eq(["Banana Nice Cream", "Peach", "Peach-Raspberry Nice Cream", "Tomato"])
+    end
+end
+
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
new file mode 100644
index 0000000..2b46fb1
--- /dev/null
+++ b/spec/spec_helper.rb
@@ -0,0 +1,4 @@
+require 'pry' 
+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..d2fd5e1
--- /dev/null
+++ b/spec/vendor_spec.rb
@@ -0,0 +1,64 @@
+require 'spec_helper'
+RSpec.describe Vendor do 
+    before(:each) do
+
+        @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
+
+    it '#exists' do 
+        expect(@vendor1).to be_an_instance_of(Vendor)
+        expect(@vendor2).to be_an_instance_of(Vendor)
+        expect(@vendor3).to be_an_instance_of(Vendor)
+    end
+
+    it '#has a name' do
+        expect(@vendor1.name).to eq ("Rocky Mountain Fresh")
+        expect(@vendor2.name).to eq ("Ba-Nom-a-Nom")
+        expect(@vendor3.name).to eq ("Palisade Peach Shack")
+    end
+
+    it '#has inventory' do 
+        expect(@vendor1.inventory).to eq({})
+        expect(@vendor2.inventory).to eq({})
+        expect(@vendor3.inventory).to eq({})
+    end
+
+    it '#has stock' do 
+        expect(@vendor1.check_stock(@item1)).to eq(0)
+        expect(@vendor2.check_stock(@item1)).to eq(0)
+        expect(@vendor3.check_stock(@item1)).to eq(0)
+    end
+
+    it '#can stock items' do 
+        @vendor1.stock(@item1, 30)
+        expect(@vendor1.check_stock(@item1)).to eq(30)
+        expect(@vendor1.check_stock(@item1)).to_not eq(0)
+        expect(@vendor2.check_stock(@item1)).to eq(0)
+        @vendor1.stock(@item1, 25)
+        expect(@vendor1.check_stock(@item1)).to eq(55)
+        expect(@vendor2.check_stock(@item1)).to eq(0)
+    end
+
+    it '#can have items in inventory' do
+        @vendor1.stock(@item1, 25)
+        @vendor1.stock(@item2, 25)
+        expect(@vendor1.inventory).to eq({@item1 => 25 , @item2 => 25})
+    end
+
+    it '#can determine potential revenue for vendors' do
+        @vendor1.stock(@item1, 35)    
+        @vendor1.stock(@item2, 7) 
+        @vendor2.stock(@item4, 50)    
+        @vendor2.stock(@item3, 25)
+        @vendor3.stock(@item1, 65)  
+        expect(@vendor1.potential_revenue).to eq (29.75)
+        expect(@vendor2.potential_revenue).to eq (345.00)
+        expect(@vendor3.potential_revenue).to eq (48.75)  
+    end
+end