Create a security policy for the following company explaining network security, physical security and access control systems:

Sunica Music and Movies is a local multimedia chain with four locations. Each store has been acting independently of one another and has difficulty coordinating customer sales from one store to another based on inventory. As a result of poor communications, revenue and customer base have been lost due to jumbled inventory from store to store, decentralized accounting, and no Internet-based commerce. With the successful implementation of a WAN solution, all stores will have the ability to access a centralized database for inventory and dynamically reorder stock based on sales. Each location will tunnel all financial transactions through a central accounting package, eliminating bookkeeping errors and centralizing the company finances. All transactions and customer inventory browsing will be done through a web interface and custom Intranet Web site. To meet their need for an Internet customer base, web servers will be located in their data center and will tie in to the company's accounting and transaction servers to provide real-time sales and inventory information to customers.