Cumulative sum with 2 date ranges

Question

I need some help with a cumulative sum based on 2 date ranges please.

When a booking is requested - date requested (date 1) When the booking is filled - date filled (date 2)

I would like the cumulative sum of when the booking is filled but still showing when it was requested.

I managed to use this formula to calculate it based on date filled.

Cumulative Count (Date Filled) = 
CALCULATE(
    [Total Bookings],
    FILTER(
        ALLSELECTED(Table),
        Table[Date Filled] <= MAX (Table[Date Filled])
    )
)

However, when I add on the date requested in to show which month it was requested from, the cumulative sum is not showing correctly.

2nd line should accumulate to 3 4th line to 4 5th line to 5
6th line to 8 etc.

I hope the above makes sense. Thank you in advance for your help :).