Question on IBU Calculation

[fvbrewery]

Ok, I´m setting up a recipe which requires 2 different aroma hops to be added on flameout. So I choose "Aroma" in the dropdown, but how about the time, should I leave it blank or input the time that they´ll remain inside the hot wort until they´re filtered out?

Thanks

 

[Ozarks Mountain Brewery]

the time for all hops except dry hopping is the same counting down for the start to flame out, so if you start at 60 then flame out would be 0 and aroma hop might be anywhere from 15 to 0