One hundred litres is written 100L or 100l. Both are correct. I prefer "l" but I thought some helicopter pilot might read "l" as "1" and argue the point about 1001 bananas.
Or possibly go off on a tangent about avgas when the EC135 we have been discussing all this time uses JetA1 or whatever.
A pilot must see the crux of an issue or problem immediately and the problem I saw was a wrong conversion from volume to mass.
The fact is, quantity or capacity can be measure by volume or mass, both are correct. It's usual to buy fuel by volume and mandatory to flight plan by mass. The relationship is given by the specific gravity. We all know this.