Good day. Need a small help in excel. Basically I want to count all the negative numbers after the last positive number in a data column

example

60
-2
-20
-40
-60

At this point the formula should return the count value as 4 (4 negative values after 60)

60
-2
-20
-40
-60
100
100
At this point the formula should return the count value as 0 (as there no negative numbers after the last two positive numbers)
60
-2
-20
-40
-60
100
100
-20
-40
-60
-80
-40
-26
At this point the formula should return the count value as 6 (after the last positive number 100)

Fundamentally the formula should return the count of all negative numbers after the last positive number is a given column range (b1..b150). It should not count blanks

Is it something that we can figure out