Return Text based on Max Sum of number values by month

[savvysum]

Hi,
This is for Google Sheets.
I need a formula that returns the text when using a sum max for a number by date.
In the below example, AA02 is the answer for January 2023 b/c 4,120 is the max sum (3,995 + 125).

cell A1	1/31/2023	2/28/2023
Result	AA02	CCC
data set
Month Year	SKU	total
1/31/2023	AA02	3995
1/31/2023	MCT06	100
1/31/2023	AA02	125
1/31/2023	MCT06	125
2/28/2023	AAA	100
2/28/2023	AAA	100
2/28/2023	AAA	100
2/28/2023	BBB	250
2/28/2023	BBB	250
2/28/2023	CCC	900