I'm trying to setup a little option pricing model in excel. I have all the information for the inputs (interest rate, IVs for different deltas, time to expiry, strike price, underlying price) but what I do not have is the actual delta for which I should be drawing the IVs from. To clarify, I have a list of IVs for each possible delta you want for the underlying security. But it's as if you're in an endless loop because you don't know what IV list to choose since it's linked to a specific delta: which you do not know.
Attaching a Delta formula in case it helps anyone visualize things.
I do not have the actual call prices since I'm dealing with illiquid cases and the end goal is to calculate those prices.