Get Previous Value at group

[Anonymous]

QlikExperts,

Need a solution at group level with required output (last column) as per below sample. Please assist.

ItemGroup	Item	Quantity	Output
A	Item-A	20	20
A	Item-B	3	60
A	Item-C	6	360
A	Item-D	4	1,440
A	Item-E	5	7,200
B	Item-A	12	12
B	Item-B	5	60
B	Item-C	17	1,020
B	Item-D	16	16,320
B	Item-E	8	1,30,560

One of the  post read that the solution at expression level is =Quantity * Alt(Above(Expr1),1)

Need a group level solution

[tresesco]

That should work. Please check the screenshot what and how to use as dimensions and expressions: