Multiple Line Chart to detect an outlier in the data

[rohi__]

Hello, everyone,
I would like to display two graphs with the following data structure.

Order	Material	Productgroup	Op	LeadTime	MonthYear
1	33	component	10	2	June 2020
1	33	component	20	3	June 2020
1	33	component	30	5	June 2020
2	25	component	10	1	June 2020
2	25	component	20	3	June 2020
2	25	component	30	2	June 2020
3	33	component	10	8	July 2020
3	33	component	20	9	July 2020
3	33	component	30	7	July 2020
4	25	component	10	2	July 2020
4	25	component	20	8	July 2020
4	25	component	30	6	July 2020

The first would be the average of the product group over time.
The second would be the average of the individual material numbers over time.
I will use the following formula for the average of the product groups.

sum(aggr(avg(LeadTime), Op, Productgroup, MonthYear))

how can I use this formula to display material numbers? I want to see many individual lines. The following approach was not working.

sum(aggr(avg(LeadTime), Op, Material, MonthYear))

I want to get something like this:

Thanks in advance!