Guess the Weight of These Sheep to win a Helicopter Ride.

Guess the combined weight, on the day, of two live sheep, which you can view, but not touch, and win this fantastic prize. Only £1.00 to enter. Only one prize. Only one winner.

To help you, we have included a sheep-calculation diagram, but only part of it. The rest is up to you. Solve this, and you could qualify for a job at GCHQ.