135 film comes in different exposure sizes: 12, 24, 26, 39. The cost is the same regardless of the number of exposures taken. It is impossible to tell once the film is out of the camera if it has been used.
Scan and upload to CD: £6.99 per film
Print film to 6″ x 4″: £7.99 per film
Print and scan to CD: £8.99 per film
The order form has all the details and services on together with a Freepost label.