There's no discount. 1hr Double is both girls rate and 2hrs is twice that. Add $100 each for les regardless of time. If you want 1 girl for 2hrs then it's twice her hourly rate.
I’m understand now about 2 hour
But for double
Let say each girl cost 300$ so that mean
300x2 total 600 and 100 extra each for some extra to
Time we might need is thought right ?