“You might get more useful information by looking at how much trouble the Russian military is having with them, and what it is costing Russia.”
Ukraine isn’t “costing” Russia much of anything from a cash standpoint.
The Civil War in Ukraine, for the rebel side, is being fought strictly from inventory.
Tanks and guns, and ammo, from the incredibly massive 60’s and 70’s Russian stockpiles, for the most part. There are some exceptions that have shown up since late October, like the 80’s-era AT Missiles.
The only cost to Russia is loading and shipping.
And a lot of it coming from the Kiev Army, too, in the form of captured equipment and ammo, as well as corrupt officers and other Ukrainians outright selling stuff to them.
It is costing them hugely, and the negative financial and international effects will last for a very long time.
I doubt that anyone is interested in how much they are spending on bullets.