There is no definitive answer to this question since there are many factors to consider. For example, if you already have a Shopify account, then development costs will typically be lower since you will not need to purchase a Shopify Plan. Additionally, if you are comfortable coding yourself, then development costs may be lower since you will not need to hire a Shopify Expert.
In general, we would say that Shopify development costs can range from free to several thousand dollars, depending on the complexity of the project. Hope this helps!