Well, for 1 day, it is $76. For 1 season, it is $350. With both, you have to rent $30 daily. Let's just say 1 season is 2 months (60 days).
In order for $76(x) to go over $350, x has to be 5, because 76 multiplied by 5 is 380.
Since you have to rent $30 daily anyways, that number doesn't matter. It's simply there to distract you.
In conclusion, if you went skiing for 5 days and bought the season ski pass, you would save more money than buying one a day for $76.