Handling payment with PayPal
You can use Excel's HYPERLINK to build a url, that can be used by your order form to open a shopping cart at Paypal.
You can see additional things to set, for example currency, at
Using PayPal with big forms, do it like this instead.
The above technique is good if you only need the customer to pay and customer information. If you want many to collect a lot of data from the customer, and the have a payment at the end, do like this instead.