How To Create A PayPal Shopping Cart Button

Log in to PayPal
Go to Merchant Tools

On the right side of the screen, under Key Features, select Buy Now Buttons. Under the section: Enter the details of the item you wish to sell:

Item Name/Service (fill in here on PayPal form page)
Item Id/Number (fill in here on PayPal form page)
Price of Item/Service (fill in here on PayPal form page)
Currency Buyer's Country - Choose a country from the drop down button to copy to your website: You can choose Buy Now or another from clickable link shown.

Security Settings: Encryption is used when you do not want others to change the cost of the item. This feature is used for downloadable products, like my eBook Easy Internet Selling, an eBook .

Sales Tax/Shipping Costs: Select your state and rate if this applies.

Select Add More if you choose from clickable link or Create Button Now link.

Add More gives you the following options:
Flat Shipping of $X.XX or a price selection rates for dollar amount of items sold. Sales Tax Calculation: Adds your State Sales Tax at the rate you pay.
Add Option Field to Your Page: Not used with Encrypted Buttons or the other options. This would be used to have your buyer select a size, color, etc. You are also able to select how the buttons appear on your page...horizontally or vertically in rows or not. Offered are buttons such as small, medium, large, Add to Cart.
Customize Your Payment Pages: You can select the default which is PayPal Primary Page or create a custom Payment Page. I selected the default page.
Customize Your Buyer's Experience: When your buyer has made a Successful Payment, you'll want a page to pop up saying that their payment was received successfully. This is customary and known as a URL thank you page in your website which is a page that is created by you. Also a Cancel Payment Url page: used if they want to cancel their payment also created by you.

Miscellaneous:

Would you like your buyer to be able to purchase more than one of an item, select Yes or No.
Would you like your buyer to provide you with their shipping address?
You have the option to make shipping options, or Yes, require shipping, or No shipping needed.
Collect Additional Information From Your Customers: Here is where you can include additional instructions or have your buyer leave you a note or message. I put, Leave Me A Message: in the box and my buyer can tell me whatever they want here in a spot I left for them. This is where you can include additional instructions or have your buyer leave you a note or message.
Choose an email address to receive payments: Here you can enter a different email address with PayPal to receive your payments. So if you had multiple sites, you can add your email addresses in your PayPal account and select from the drop down box, which one to receive payment.
Next select Preview or Create Button Now.
Preview allows you to see the button and check that everything is correct. Create Button Now gives you the code in HTML for you to paste into your website HTML page in the proper spot.

Summary:

So for the first item, let's say it is an Earring.

You call it EAR101 and Item Number is the same, EAR101, Price is $10.00.

For the next earring item you just go into the HTML code and change EAR101 to EAR102 and change the price to whatever price you want EAR102 to amount you want it to be.

If it is a necklace, then call it NECKLACE201 change the item number to NECKLACE201 and change the price to $30.00.

Bracelets would be BRACELET301, change item number to BRACELET301 and change the price to $15.00.

The secret here is to code each category the same keeping each category a different STARTING number and number each product item in it's category sequentially.

Now that you have the instructions clearly spelled out, you just paste the code into your page site under the item picture in the HTML portion of the coding.

I hope this has been helpful.