I've used something like this list to get "over the hump" for $35 to reach free shipping without prime.
It's horribly annoying to have a product that is $34.99 and you want it, but it'll cost shipping unless you get the damn Volkswagen screw; and then Amazon ships them individually anyway.
Just play their stupid game. My wife does this all the time, buys random items just to go past the free shipping range, then the item goes into trash (or is returned, if possible).
Even sellers started doing this, but instead of selling random items, they sell "extra hardened packaging material" conveniently at $1, $2, $3... prices. Of course when item arrives, no extra material to be seen. When questioned, one of them said "well, the package had cardboard box - that's it, wink wink, please do not report us".
I have done this specifically with the second item in the list in the OP.
Not only did I do it to get free shipping, I got it to get free international shipping.
For extra bonus CO2 points, the other item was coming from a different country. So I basically paid $0.42 to have a single packet of kool-aid shipped across the pacific ocean.
(I'd never had kool-aid before and I must say I was disappointed.)
You can also get preorder items, it adds to the total. Your actual items hips right away but the preorder doesn’t. Once you get your item, cancel the preorder and you’re done.