help with unflattened data

This might be a bit convoluted, but seems to work:

Measure 4 = 
VAR __table = FILTER('Table7',[Count]>0)
VAR __table1 = GROUPBY(__table,[Asset ID],"__max",MAXX(CURRENTGROUP(),[Count]),"__base",SUMX(CURRENTGROUP(),[Base]))
VAR __table2 = ADDCOLUMNS(__table1,"__baseMax",MAXX(FILTER(ALL('Table7'),'Table7'[Asset ID]=EARLIER([Asset ID]) && 'Table7'[Count]=[__max]),[Base]))
VAR __table3 = ADDCOLUMNS(__table2,"__baseFinal",[__base] - [__baseMax])
RETURN
SUMX(__table3,[__baseFinal])

See Table7 of attached.

Ashish - thanks to your help on a different question I had, I was able to figure out the intended result as follows.  The RELATED function did the trick.  

Thanks

CALCULATE(
	SUM(AssetReturnTable[Base]),
    ALLSELECTED(AssetReturnTable[Base]),
    FILTER(AssetReturnTable,AssetReturnTable[Count]>0),
    FILTER(AssetReturnTable,AssetReturnTable[Count]<RELATED(SummaryInputTable[Lease Term (months)])+1),
)