Do you know any tool to easily isolate the cost of each of my Google Cloud Functions?

I want to know how much is each of my cloud functions spending (break up the total costs on Google Cloud Functions that is shown in my Billing Console). I know I can calculate it probably looking at the metrics and configuration of each function but it would be a hassle to do it for each of my functions (and I have a lot). Also, I couldn't find anyway of doing it using the Billing Console alone. Thanks in advance 👍 BTW: is anybody else having the same issue. Maybe my team can build some tool for it and start a business lol