Table:
0
A
B
C
D
E
1
Year
Title
Billboard Hot 100
Album
Label
2
1963
Dooley
—
Back Porch Bluegrass
Elektra
3
1963
Hootin' Banjo [Duelin' Banjo]
—
Back Porch Bluegrass
Elektra
4
1965
Nobody Knows
—
singles only
Capitol
5
1966
The Last Thing On My Mind
—
singles only
Capitol
6
1968
Reason To Believe
—
Wheatstraw Suite
Elektra
7
1969
Listen To The Sound
—
Wheatstraw Suite
Elektra
8
1970
Rainmaker
—
Copperfields
Elektra
9
1970
Close The Door Lightly
—
Copperfields
Elektra
10
1970
One Too Many Mornings
—
singles only
White Whale
11
1970
Comin' Home Again
—
singles only
White Whale
12
1971
It's About Time
No.92
singles only
Anthem
13
1972
One A.M.
No.111
Roots and Branches
Anthem
14
1972
America (The Lady Of The Harbor)
—
single only
Anthem
15
1973
Hot Rod Banjo
—
Tribute to the American Duck
Poppy
16
1975
Stones Throw Away
—
single only
United Artists
17
1977
The Poet
—
The Dillards Vs. The Incredible L.A. Time Machine
Sonet

Questions and formulas:
Question: What is the total years for roots and branches?
Formula: SUM(FILTER(A1,D1="roots and branches"))
Formula2: SUM(FILTER(A2:A17,D2:D17="roots and branches"))
Level: easy