This is a way to reduce the bounce rate of your website. Research shows that 56% of website visitors will bounce of a website when presented with unexpected costs. If you set a price, people expect to pay exactly that much, if they reach the checkout and realize they either have to pay extra in shipping, management, fees or taxes gets them to hesitate, and most likely bounce off. Present people with the final product and services prices upfront and communicate it properly before the checkout.