Hello all,
Do you know of a formula what will let me know when have cumulated 40hr or
vacation time?

e.g. the list of hours

36.96
39.27
41.58 <-- 40hr of Vac time
43.89
46.2
48.51
50.82
53.13
55.44
57.75
60.06
62.37
64.68
66.99
69.3
71.61
73.92
76.23
78.54
80.85 <-- 40hr of Vac time
83.16
85.47
87.78
90.09