Extra cost for services

[Lana-Jayne]

Hi all I've tried searching for this but can't find the answer. I've recently invested into some dashing diva French wraps. I really like them and I'm wanting to offer them to my clients. I want to use them with my Gelax gel polish but I'm unsure whether I should be charging extra for them or just stick with my current gel polish price. Or even how much more I should charge if I did. I currently charge £20 for Gelax. Any advice would be greatly appreciated

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