Some ROAS help pls, for my business plan

Hi all,
I need your help finding the typical ROAS figures for various categories, on and offline commerce, and for any marketing channel.
Why? Because I'd developing a lead generation platform and need to know if I send clients a lead that turns into a sale, what percentage of that sale cost they would be willing to pay.
If the average ROAS for their category is, say 400% (or 4:1) then I could assume they would be willing to pay 25% of the revenue generated by a sale in advertising cost (ie…
Some ROAS help pls, for my business plan

See original post by Steve M77