This would be MUCH simpler if you kept numbers and text separate. I would put TYPE in it's own column, Amount in it's column and Unit in it's own column - this will also make entering data easier too.

This way, your formula works fine...
A
B
C
D
E
F
G
H
1
 date iteam amount
2
1/9/2021
 mutton
5
 kg
2000
3
1/9/2021
 mutton
10
 kg
5000
4
1/10/2021
 mutton
3
 kg
1500
 mutton
19600
5
1/11/2021
 mutton
5
 kg
2000
 Chicken
4700
6
1/15/2021
 mutton
6
 kg
2100
7
1/16/2021
 mutton
15
 kg
7000
8
1/9/2021
 chicken
1
 kg
200
9
1/9/2021
 chicken
5
 kg
1000
10
1/9/2021
 chicken
3
 kg
600
11
1/10/2021
 chicken
3
 kg
600
12
1/11/2021
 chicken
10
 kg
2000
13
1/15/2021
 chicken
1
 kg
100
14
1/16/2021
 chicken
2
 kg
200


H4=SUMIFS(E:E,B:B,G4)
copied down