An Ecommerce Site Shipping Question

#EcommerceSiteShippingQuestion
I have a client that I’m working with that sells syrup here in Jax…

I have them set up with an e-commerce solution site but shipping is going to be the pricing challenge for their online interface.

What solutions have you guys used for clients in the past that addresses that with the least amount of headache?

Background info:
one of the partners works at the post office and is advocating pirateship.com , But they don’t have a shopping cart, and require uploading spreadsheet to them as a solution to shipping orders, which adds an extra step to fulfillment.

is there a one stop solution any of you know of that I may have overlooked?

USPS real time calculation is what I typically use for my clients.

is this something that can be integrated into the site so that the pricing and shipping can be configured up front?

this is with the wix store app, and not another ecommerce option correct?

Yes - this is real-time shipping with Wix Stores.

Im missing something because when my client tested it, it gave the same shipping price wherever she “test shipped” to…

You may want to send your client this guide, they may have missed a step: https://support.wix.com/en/article/setting-up-real-time-shipping-calculation-with-usps-in-wix-stores