Where do I find formula for how Benefits calculates imputed income amt on Group Term Life insurance?

We are on 12.2.11 RUP18 patch level. I am looking for the fast formula that Standard Benefits uses to calculate the value passed to payroll for the imputed income element we have set up for group term life insurance. We are adding a second employer paid life insurance plan for $10,000 coverage and I need to include this in the calculation for imputed income.

Thanks

Jody