Group or rank for allocation for optimal utilization

Hi,

My dataset is as follows

ID       Length

SDF    340

GEW  510

DFA    80

SRD   450

ADV  350

AND SO ON.....

and I have rack dimension length to be 1650.

I need a ranking or grouping mechanism for me to suggest the IDs to be places together in the rack of provided length, so that the resource is utilised in optimal manner.

For instance, if 1,2,3 & 4 are grouped, unutilised length is 270. But if 1,2,4 & 5 is ranked for same group, then the total is 1650 makes it completely utlized. So the ultimate aim is to bring the unutilised closed to zero.

Any workaround for this is hugely appreciated and I would be so thankful.

Thanks in advance.