How to set Price

Simple Product Price

Simple product includes products are those that has no variations included and prices does not base on the variations selected.

you can add the product regular price or add on the Sales price if the product was on promotion or product price was marked down.

Variable Product Price

Variable Product product prices depends on the product variations selected. navigate on the product data options Variations tab and click on the the product variation to toggle more options. (please refer on the How to add product). I here you can add prices for each variations such as different prices for different sizes e.g. small for $30, medium for $35 etc.