Ok I think you get the idea. This apparently isn’t an exact science, but Biden is clearly ahead anywhere from 61 to 71 delegates.
There is one more thing to point out though. Since Biden has been endorsed by Bloomberg, Buttigieg, and Klobuchar, he’ll likely get their delegates in the first round of voting at the DNC later this year. Which means you can add another 77 delegates to Biden’s total, at least via the AP’s count, which would put him 148 delegates ahead.