WIX Stores: Get product item price

I am developing my own product item page, and I would like to display the price of item(s) including the extra charge for variant choices. This is done on the Wix product item template page, but I do not know how to get/calculate this information from the database.

Not enough INPUT → this is why you are already waiting 3days for an answer!!!

Re-describe your issue in detail, showing some pics for better understanding your issue.
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The more INPUT ------> the more OUTPUT !!!