you can add attributes wise price for products, for that you have to add attributes first from “product module > attributes”, the process is you will add list of attribute in here then able to set price for that attribute from product create / edit .
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How to add new Attribute set
click on new attribute button, you will see below options
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How to add Price With Product Variants
you will see an option to add attributes to products when ever you go to add new product or edit a product, it will be look like below, you have to select an attribute then it terms will be shown in a select option, you have to double click on any on those which one you want to add with this product
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now you will see option to set price for this variant as like below
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