Online store

Hello, engaged in the promotion of online furniture store and cosmetics. I want to try to create an affiliate program, but how effective will it be?

What percentage will be of interest to webmasters if the average purchase of furniture is 10 thousand, and for cosmetics from 3-5.
Does it actually make sense, did anyone come across any chance?

And how to solve the problem with deductions, if the order is received by phone.