Fuel consumption with 5 engine.

Hi

I am onboard a ship where we have 5 engine.
I can choose to run 1 engine alone or 2 engines runnings, or 3,4,5

But I wont to know how I can calculate, by knowing the kW I shall use, which configuration of engines I shall use.


I If only shall use 2000 kW the excel shall tell me, it is better to run engines no 2 and no 3 in 70 % load.
Get most kW for less fuel

See attached excel