Single Product
Multiply Price by Quantity
When you increase or decrease a product quantity on the single product page, the price will adjust accordingly, reflecting the total cost based on the selected quantity.

With the help of the Min-Max Step Control Plugin, you can do that by just following a few simple steps:
Navigate to WooCommerce >> Min Max Step Quantity.
You will see a “SETTINGS (UNIVERSAL)” section, where you can enable the price multiplied by the quantity option. Click on the toggle bar to turn on this option. After that, click the SAVE ALL button.

Now your customer can understand how much this product will cost after increasing or decreasing quantity.