__**Price Tiers**__

There are a bunch of different pricing structures used in the industry, and at GoSimple we aim to support all of them if possible.

Our pricing system supports multiple **Price Tiers**, and an order can be set as to which we look into for a price 1st, 2nd, 3rd...etc.  Using the order specified by our client, we will look into the stack of **Price Tiers** until we find a match.

First, some notes about how **Price Tiers** work.
  - They are temporal, meaning if the price changes for a specific **key**, we store a new row with a column denoting when it went into effect.
  - For each **key** we are given a price, and a UOM that price corresponds to.
Lets go over the current supported **Price Tiers**, and their **key**:

   * **Price Default** - Product
      * Allows specifying a single price for a product.  This can be sent directly on the product feed.
   * **Price List** - Product, Date Range, Cost Basis Type
      * Allows specifying a price for a product by different time periods, and cost basis types.  This is sent in it's own feed.
   * **Price Class** - Product, Price Class(ifier), Date Range, Cost Basis Type
      * Allows specifying a price for a product by price classifier, different time periods, and cost basis types.  Price Classifiers can be created in an admin screen, and a companies' bucketed into Price Classifiers, pricing can then be set up at the Price Classifier.  For clients with a large number of companies and products, we advise using this.  Gives the same level of detail as **Price Company** and **Price Sale**.  This is sent in it's own feed.
   * **Price Company** - Product, Company, Date Range, Cost Basis Type
      * Allows specifying a price for a product by company, different time periods, and cost basis types.  For clients with a large number of companies and products, this is not advised.  Gives the same level of detail as **Price Class** and **Price Sale**.  This is sent in it's own feed.
   * **Price Sale** - Product, Company, Date Range, Cost Basis Type
      * Allows specifying a price for a product by company, different time periods, and cost basis types.  Gives the same level of detail as **Price Class** and **Price Company**.  This is generated from sale data sent by the client.