How to monitor the cost of workers kv in real time

We are using workers kv, and we want to be able to monitor the cost.
Currently, in the manage workers kv page, we only can see metrics like: Requests, Duration, Egress data transfer and Median CPU Time. However no mentioning about the current cost.
In the billing page we only can see history of last bills. And no mentioning about the current cost.
Please, advise on how to monitor the cost of our workers kv usage in real time.