Let price of pre-sale ticket be p and marked price of the ticket be x.
Then,
p = x - 2 ---------------------------(1)
and
54p + 82x = 980 -------------------(2)
On substituting the value of p from (1) in (2) we get
54(x-2) + 82x = 980
=> 54x - 108 + 82x = 980
=> 136x = 980 +108
=> x = 1088/136
=> x = 8
Therefore price of ticket at event is $8