If you were to buy 5 yards at $14 a yard, your first cost would be at $70. But with 14 being 20% of 70, you would subtract 14 out of the $70, which would leave your final cost at $56.
25 tagged deers, 125 deers not tagged
total of 120 tagged deers
120/25 = 4.8
125 x 4.8 = 600
600 + 120 = 720
So there are a total of 720 deers in the refuge.