Table:
0
A
B
C
D
E
F
G
H
I
J
1
20 years
2400 kWh/kW p y
2200 kWh/kW p y
2000 kWh/kW p y
1800 kWh/kW p y
1600 kWh/kW p y
1400 kWh/kW p y
1200 kWh/kW p y
1000 kWh/kW p y
800 kWh/kW p y
2
$200 /kW p
0.8
0.9
1.0
1.1
1.3
1.4
1.7
2.0
2.5
3
$600 /kW p
2.5
2.7
3.0
3.3
3.8
4.3
5.0
6.0
7.5
4
$1000 /kW p
4.2
4.5
5.0
5.6
6.3
7.1
8.3
10.0
12.5
5
$1400 /kW p
5.8
6.4
7.0
7.8
8.8
10.0
11.7
14.0
17.5
6
$1800 /kW p
7.5
8.2
9.0
10.0
11.3
12.9
15.0
18.0
22.5
7
$2200 /kW p
9.2
10.0
11.0
12.2
13.8
15.7
18.3
22.0
27.5
8
$2600 /kW p
10.8
11.8
13.0
14.4
16.3
18.6
21.7
26.0
32.5

Questions and formulas:
Question: Name the 20 years for 1600 kwh/kw p y is 8.8
Formula: LET(query1,SUMMARIZE(A1,SUMX(F1)),FILTER(query1,CHOOSECOLS(query1,2)=8.8))
Formula2: LET(query1,SUMMARIZE(A2:A8,SUMX(F2:F8)),FILTER(query1,CHOOSECOLS(query1,2)=8.8))
Level: hard
Question: Name the 1800 kwh/kw p y when 2400 kwh/kw p y is 5.8
Formula: SUM(FILTER(E1, B1=5.8))
Formula2: SUM(FILTER(E2:E8, B2:B8=5.8))
Level: easy