1099-R Boxes 5 and 9b

Good morning,

When you receive a 1099R with amount in boxes 5 and 9b, what do you do with these amounts?

For example: Box 1 Gross Dist = 100,000, Box 5 Employee Contributions/Roth Cont/Insurance = 5,000, and box 9b Total Employee Contritubtion = 176,000.

Normally, I would subtract box 5 from box 1, so in this example that would leave $95,000.

Box 9b is new to me, but after some reading it seems like I would use the simplified method to get a figure based on the annuity starting date. The annuity started after 1996 at age 63, so I used the 260 month table amount to get the following: 176,000/260 = 677, then 677 x 12 = 8,124 would be a return of basis/after tax contributions.

If this is correct, do I add box 5's $5,000 to the box 9b's 8,124 calculated amount?

Thanks!