Lemain,
By the time you get to the Red Captions, you should no longer be in the air - The RFM minimum landing allowance for this aircraft is 50Kgs. The Red + Audio warning appears at 26kgs in the Port Supply Tank and 22kgs in the Starboard. If those lights come on you are already in the poo.
I'll not argue the toss over figures but 200kgs per hour/3kgs per min is the twin engine fuel planning rate. 4 kgs on one engine may buy you 2 mins but, as I have already stated, you are already in the poo.