Helps the formula add the total of the QUANTITY column according to the STT column. If it is duplicated, take the line above

[Excelpromax123]

Hello everyone .
I need a formula, or VBA function to add the total quantity column according to the STT column. If the STT is the same, take the top line (red colored line). Thank you

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[shaowu459]

工作簿1
	A	B	C	D	E	F	G
1
2
3			NO	Qty		Sum Qty
4			1	10		310
5			2	20
6			2	30
7			2	40
8			3	50
9			4	60
10			4	70
11			5	80
12			6	90
13
14
Sheet1

Cell Formulas
Range	Formula
F4	F4	=SUM((MATCH(C4:C12,C:C,)=ROW(C4:C12))*D4:D12)
Press CTRL+SHIFT+ENTER to enter array formulas.