Thank you Eric
I have now gone through the tutorial and found it very interseting. However I don't think it solves my requirements.
Each product page is static and we know what the three product IDs are for the three forms. What I feel we need to be doing is sendimng the appropriate product ID to the Cart when the add to cart button is pressed.
I then expect that the cart, when acessed/displayed, reteives the data from the DB for each of the product IDs it has received. Then uses the data to calculate the total amount payable as well as displaying the details of eachg prodcut as retreived from the DB through the product IDs.
I guess the real question is - can this be done?