I’m not sure how the calculations work in other countries, but the US was/is heavily depreciating its donations, and funding/facilitating a much of European donations.
It's more messed up than that. The ROI on US dollars vs Euros is stupefying. There has been a fairly significant spend IN the us retooling for this war. The ramp up of 155 production ISNT aid to Ukraine but is going to benefit them.
And I called out 155 for a reason, the ebb and flow of it has been at the forefront of Ukraine being successful or failing. It is the the most consistently asked for and consumed large item as it in combination with drones has proven effective beyond anyones expectations.
Sure about the 152mm? Not 155mm?
I'd have to double check but its quite likely. 152mm being the popular Soviet/WP large artillery caliber which Ukraine no doubt has (or had, at the beginning) a lot of legacy Soviet-era heavy artillery.
The only thing I could find about Greece is Germany giving 40 Marder APCs to Greece so Greece could give 40 BMP-1 to Ukraine.