The Royal United Services Institute (RUSI) has an updated tally on defensive and offensive munition expenditures. It's likely not 100% accurate due to the sensitive nature of those figures.

> 11,294 munitions in the first 16 days of the conflict, at a cost of approximately $26 billion.

Several detailed tables are in the link below.

https://www.rusi.org/explore-our-research/publications/comme...

Incidentally, $26B is a sum in the same ballpark as the cost of eradicating homelessness in the US, ending large-scale hunger worldwide or making significant progress towards safe drinking water for all or the eradication of malaria.