Construct the BAB factor: leverage-neutral long low-beta and short high-beta portfolios. Return = weighted average low-beta return / avg-beta_low - weighted average high-beta return / avg-beta_high.
Enter the values for the scenario you are assessing. Construct the BAB factor: leverage-neutral long low-beta and short high-beta portfolios. Return = weighted average low-beta return / avg-beta_low - weighted average high-beta return / avg-beta_high. Use the betting against beta result to inform your calculation.