How much does your app icon cost?

I’m writing an article for Mass Media. We compare how much an app icon costs in different markets and what factors can influence the price. I need to find out how many time it takes to create an icon and whether customers conduct A/B tests. If you have your own app, please, answer some questions about the cost of your icon and I will share the results with you later.
This is a poll. You can answer only some questions but I ask you to answer all of them. Leave your email just if you want to know the results
So this is the Google Form I ask you to fill in

Thank you for help!
If you know, how to spread this poll, please help me in my research.