Attached is two copies of the add to cart page. One has the cart working but is not collecting the correct quantity value because it is just got the binding value set to '1'. The second has my attempt at adjusting the record set to join the table that has the value that is entered in the form. ( the form field is 'Number of flats under management' in the company details section of the form) And then binding this value to the quantity field in the cart. this version breaks the cart function.
Hope this makes sense and you can see what I am trying to do.