I appreciate your effort, it is hard to pin down the current prices of various shells and which shells are always involved in contracts, or even how many contracts are floating around or have recently been signed.
It has been many years since I served on the 155 and it was surprising at first to learn the Marines are doing away with most of its artillery but weapon systems change.
“The U.S. Marine Corps is remaking itself to better fight China in a potential conflict, and it’s making bold choices to make it happen. The Marines will eliminate all of their tank units (a capability the service has had for nearly a century), most of its tube artillery, and a substantial amount of aviation units.
In return the service will bulk up with long-range rocket artillery and anti-ship missiles, weapons the service thinks will be more useful in island-hopping campaigns in the South Pacific.”
https://www.popularmechanics.com/military/weapons/a31915295/marine-corps-tanks/
The Marines will eliminate all of their tank units (a capability the service has had for nearly a century), most of its tube artillery,
This is like Rumsfeld and his “experts” who decided artillery was obsolete and tried to kill the Palladin.
Since WW1, in peer conflicts, 60+ percent of casualties has been from artillery.
Everything else: rifles, grenades, bombs, missiles, machine guns, rockets, tanks, submaries, destroyers, mines .... all the rest is 40 percent !
They spend hundreds of billions on everything else, then dick around and Mickey Mouse with 70% of warfighting capability - artillery.
this guy is a former Canadian military staff officer. He talks about artillery as ~70% of all casualties.
(for the Ukraine war, I bet it is at least 70%)
https://youtu.be/0p2psJbLc44?t=278