Draw an ERD " Entity-Relation Diagram"

I have a homework that's due at 11 pm. EST I would like to have someone help me with it. Swamp Things (ST) is a company that sells exclusive swamp-related items over the Internet. Customers go to ST's web site and select items from an online catalogue (much like [login to view URL]). Once they have selected the items that they wish to purchase, they enter in their Customer information (if they are a returning customer, they can just enter in their Customer Num). The customer pays by credit card, via an online checkout process run by an independent entity (ST does not need to track the credit card information). The system creates an invoice like that shown below - this is mailed to the customer with their products. At the end of each month, ST's management generates a report showing total sales for the month (broken down by Product). Also at the end of each month, the management needs a printout of each Customer's purchases for the month. When a sale is made, ST's employees take the items out of inventory and send them to the customer. Products are one of two types - perishable and non-perishable. For all perishable products, ST needs to track the expiration date for the product. The Product Number is on a bar code that is read into the system. The program automatically updates the inventory numbers when a product is sold. When a product reaches an inventory level of less than five items in stock, the program automatically contacts a supplier of that product via EDI. Multiple suppliers provide each product, but each supplier only provides one product. ST keeps track of each supplier's name and all phone numbers. When the products arrive at ST, the bar codes are scanned in and the program updates the inventory levels. Invoice Invoice Number: 1234 Order Date: September 1, 2014 Customer Name: Adam Lefondre Customer Number: 330 Product Num Product Desc. Price Quantity Total Cost ST22 Slime $8.00 3 $24.00 ST44 Leaves $10.00 4 $40.00 Total Due: $64.00 Questions: *Draw an ERD that shows the necessary data components for the database in ST's new system. *If you make assumptions (which you should keep to an absolute minimum!), make sure to list them in detail. *Include all calculated fields needed to create the Invoice shown above. I will only pay $7 that's include the freelancer.com fees! "No more, No less"!!