The full expense that a user will bear before and after purchase is reflected on the checkout page - the total amount is the item price + shipping fare + sales tax. 
The full final price customers pay is calculated automatically on the checkout page.

We accept Apple Pay, Meta Pay, Venmo, Google Pay, and credit/debit card payments such as Visa, Mastercard, American Express, etc.

Sales Tax:

Sales Tax is added to the product price and paid during the check-out.

The Final price will be shown at the check-out.