I came up with 40kg/min as a fuel flow, not a cost index but evidently that’s not correct. I asked for what cost index you would use for LRC and you said 40. I can see this is getting a little frustrating for you but I appreciate you trying and your patience. To be honest, I personally am still confused. Maybe you could attach that reference you mentioned as a screenshot? The table above with the different engine types is the only one I found in the FCOM, is this the same table you are referring to?
Pineteam, maybe you can help me out and give OPEN DES a rest lol?