Earnings Calculations for missed deferrals

[Nassau]

My client recently funded a QNEC for 3 participants covering a total of 46 pay periods. We are now at the point of calculating the earnings. If we were to calculate the earnings by participant and trade date, there are 111 total trade dates that need to be accounted for. I have two questions:

If the client uses the highest earnings rate in the plan, is it based on the entire plan's fund lineup, or since this plan has auto-enroll with a default into the Target funds, would it be based on the highest return within one of the default funds

Or, can we use the midpoint method to calculate the earnings and base it on the current allocations for the participants?