Once you get the info from your sales person try Vanguard and Fidelity
https://www.fidelity.com/research-annuities/overview to see what they would charge for an annuity.
Do a search on annuities on the internet and look for pricing calculators.
Immediate Annuities - Income Annuity Quote Calculator - ImmediateAnnuities.com
I am not recommending the links. Just a place for you to start.