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 + sales tax.
The full final price customers pay is calculated automatically on the checkout page.
For online shipping orders:
We accept credit/debit cards payment, and PayPal.
For Sales Tax for the US, it is 7%. It's added in product price.
The final price will be shown at the time of check out.