Burden Costs using rates in custom table and Burden Extension

Hello All,

I have a custom table that houses rates for associate for bonus percent and benefit percent.  It was requested that the Burden Costing use the extension to take the bonus pct and benefit pct as the multiplier to create two separate burden expenditures...one for bonus and one for benefit.

Since the PA_CLIENT_EXTN_BURDEN. Override_Rate_Rev_Id is the extension and it expects to output x_sch_fixed_ and x_rate_sch_rev_id this implies to me that a Burden Rate Schedule needs to exist for this.  How would I get the Bonus and Benefit percentages in the Burden Rate Schedule for each associate?  Including updating it as person rates change.