excel 如何利用寫入函數得到對應的名稱去計算得到E2、E5、E8、E11的數據?加總名稱欄中包含的字樣對應的次數,並加以加總
比如包含有A字樣的次數加總E2儲存格中的總和為51,這樣的函數該怎麼寫呢?

name		次數		包含有A字樣的次數加總
A-1		6		51
C		1		
A-7		1		包含有C字樣的次數加總
B		4		38
CD		5		
F88		6		包含有B字樣的次數加總
A-1		1		27
C-2		2		
A-7		3		包含有F字樣的次數加總
A-1		4		22
C		2		
A-7		6		
B38		7		
CD-4		1		
F3		9		
A-1		3		
C-2		11		
A-7		3		
A-1		13		
C		14		
A-7		8		
B7		16		
CD-8		2		
F4		7		
A-1		3
一般版本做法:
E2:
=SUMPRODUCT((LEFT(A2:A100)="A") * (C2:C100))
E5:
=SUMPRODUCT((LEFT(A2:A100)="C") * (C2:C100))
E8:
=SUMPRODUCT((LEFT(A2:A100)="B") * (C2:C100))
E11:
=SUMPRODUCT((LEFT(A2:A100)="F") * (C2:C100))
2019及365版本做法:
E2:
=SUM(FILTER(C2:C100,LEFT(A2:A100)="A"))
E5:
=SUM(FILTER(C2:C100,LEFT(A2:A100)="C"))
E8:
=SUM(FILTER(C2:C100,LEFT(A2:A100)="B"))
E11:
=SUM(FILTER(C2:C100,LEFT(A2:A100)="F"))