How To Compute Net Bases From Valuator Stats?

[bigbird]

We use Net Bases (Total Bases + Walks) as one of our categories. I know that's already available in the Valuator (thanks!) but I'd like to compute the actual number of projected Net Bases for each player. I know how to compute Total Bases but I can't quite figure out how to use BB% to determine the number of projected walks for each player.

Can someone please provide the correct formula I can plug into Excel to compute projected Net Bases using the stats from the Valuator? Thanks!