Max items = 198
Belt speed = 400 / 60 = 6.66.. items/sec
1 Green bottle = 6 sec / 0.75 speed = 8 sec
6.66 items/ sec * 8 sec = 53.33.. ingredients on the belt for 8 sec delay.
Then ingredients are distributed with ratios accordingly.
Combinators are tracking production/consumption. Input belt mixers are controlling total amount of resources, also mix with 1 copper : 4 iron ratio.
Blueprint string