Not that I would expect an identical setup, but I've weighed the beans used in my DeLonghi ESAM4200 for single and double shots.
When turned up to maximum strength, it uses 12g for a single and 18g for a double. I prefer the flavour I get from a single (drink size dialled just above smallest - maybe 8 o'clock on the dial).
As such, I make 2 single drinks into a small cup of hot water. That's 24g of beans! But I do use a 50/50 mix of full caff and decaf so it's not cheap but it's not rocket fuel either.
YMMV but what I did was put a fixed amount of beans in the hopper and count the drinks it took to empty. After a few tries I was able to get 72g to produce 6 singles with no leftover beans nor "empty" grinder time. 72/6 = 12g
N.B. I haven't checked, but would presume the grinder runs on a timed system rather than weight.