A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hi,
I would suggest to use greater or equal to... (>=0, >=30, >=60, >=90, >=180)
now,
you can have LOOKUP function
assuming that values in cell A1
in cell A2 write:
=IF($A$1<0,"",LOOKUP($A$1,{0,30,60,90,180},{"0-30","30-60","60-90","90+","180+"}))
or
using mathematic symbols
=IF($A$1<0,"",LOOKUP($A$1,{0,30,60,90,180},{"[0-30)","[30-60)","[60-90)","[90-180)",">=180"}))