Just about every one of those guys has been called up to the big leagues now, or had their contract purchased in November, so each of them are making more than than $33,700 minimum.
You need to account them when considering the big league player payroll. Guys like Bryan Aug made over 400k last year as a free agent. It's safe to assume the payroll is closer to the 103 million than the 93 million that you had. At least include Zach Cox, who is making 750k this year.