QOs are based on the previous year's paragraph 1 salary (meaning signing bonuses don't count, which only really matters for guys on their ELCs). Beyond that, it depends on what that salary was.
Up to (and including) $600,000: QO is 110% of previous year's salary
Between $600,000 and $1,000,000: QO is 105% of previous year's salary
$1,000,000 or greater: 100% of previous year's salary.
So here's the QOs for the Sabres RFAs
Catenacci: $632,500
Deslauriers: $715k
Foligno: $2.25M
Girgensons: $874,125
Guptill: $787,500
Jacobs: $632,500
Kasdorf: $632,500
Lieuwen: $665,500
Makarov: $632,500
McCabe: $874,125
Nelson: $874,125
Nevins: $660k
Ristolainen: $874,125
Obviously there are a few guys in that group who aren't getting qualified