How to find added oil liters from notifications

[Anonymous]

Hi,

I have loads of notifications in where has been reported added oil in (desi)liters along with some other text such as the oil added. Here are some examples of the data I have (Notification) and two colums I'd like to have (oil added and for calculation). 

Spoiler

Notification	Oil added	For calculation
Added DTE25 0,5l	0,5l	0,5
Added 0,5l DTE25	0,5l	0,5
5 dl of DTE25 added	5dl	0,5
0,5 liters of DTE25 added	0,5l	0,5
5 desiliters of oil added	5dl	0,5
Added 200 l oil	200l	200
Added SHC PM 220 80 L	80l	80
Added 600xp320 Mobil 1.5l	1,5l	1,5
AL8 oil addition 50 litres	50l	50
78P685 8 desilitres added DTE25	8dl	0,8

Basically I'd like to search for combination of any amount of numbers (might or might not include comma) with l or dl or litres or desilitres with or without space between the numbers and the text. Is there any way this can be done?

Anssi