Mathematics at Heanor Gate Science College

Like the Fibonacci sequence 1, 1, 2, 3, 5, 8, . . . a certain turkey flock has as many turkeys on a given day as the sum of the number of turkeys on the previous two days.

If there were 79 turkeys on November 7th, and 542 turkeys on November 11th, how many turkeys were there on November 18th?

Put your answer in the boxes in D8 or E8 - make sure you include your name and registration Group