Imagine that. The cost of everything going up and up and up. Who'd have thunk it? Welcome to inflation fallout effects. Just have to factor that in as the cost of doing business, or, buy local and pick it up.
Yet, somehow, I too operate a business that ships about 3K per month between expedited, ground and freight and I have mananaged not to literally rip people off on shipping because the costs for USPS and Ground have not changed even remotely close enough to justify what you just tried to.
This is blatantly using a bullshit price for shipping because directly raising the item price to make a sketchy profit would put them lower in Google Shopping results. If I, as a small business owner, can ship these items for a 1/4 of what they are, that is a RIP-OFF or at minimum an unethical business practice, sir. Some of us still run our businesses ethically. Imagine that.