As others have said, adding 8-10% to base salary is a pretty good estimate. (Mine was 8.5% last year.)

Keep in mind that as a newhire, you'll be on the "18-day training schedule" for at least the first four months or so, maybe longer depending on the timing of the schedule bids. That schedule pays 22% more money, working 20% more days, paying $76,327 annually for first-year pilots.

So 4 months of that schedule, plus 8 months of the 7/7, plus ~9% in overtime and holiday pay, puts you at roughly $73,193.

You can put 20% of your gross into a 401k, and the company will match 51% of what you put in. So if you max it out, that's another $7466 added to your bottom line, bringing you to $80,659.

Good health, dental, and vision insurance for you and your family are also included for no premium, so factor that in as you see fit. No idea of the real dollar value of that.