I realize, a lot has been writen about this subject but I still don't get it. My question is how to calculate other ingredients like seeds, oats and such. I have started to sell at the tailgate market and would like to make good use of my oven- and mixer capacity. I can bake up to 5 loafs @ 500gr (free form). That's also about what my mixer can manage. I have several recipes which I would like to adjust. This is my Multi Seed Whole Wheat Bread. How would it look speld out in bakers percentage?

preferment

450gr. WW

45gr Flax seed

1/8tsp yeast

580 gr. water

seed mix I toast and put in at the last fold

46 gr. Sunflower seed

46 gr.Pumkin seed

35gr. Sesame seed

final dough:

750gr. AP

25 gr. Salt

3/4tsp yeast

200 gr. water

the total yeast comes to 3gr

this gives me a batch of 2180gr.  I would like to have a batch of 2600gr.

I highly appreciate your help.