FleetKraft reads the postcode at the end of the pickup and delivery addresses and looks for a matching zone and rate card line. When the postcode is missing or outside your zones, or there is no matching line, the booking has no price.
Set the price on the job page: type it in the Job card and press Save. You can do this at any stage until the job is invoiced. To price such jobs automatically, add the postcodes to a zone, or add a catch-all line from anywhere to anywhere for any service.