Aggregate issue

[everest226]

sum({<Is = {'N'},IsH = {'N'},[Date]= {">=$(vFrom)<=$(vTo)"},
[order Date]= {">=$(vGFrom)<=$(vGTo)"}> }[Cost])

I used Aggregate as below but getting error. i want to use aggr function because the total when exported in excel was not correct . Am i missing something from bellow expression 

sum(aggr({<Is = {'N'},IsH = {'N'},[Date]= {">=$(vFrom)<=$(vTo)"},
[order Date]= {">=$(vGFrom)<=$(vGTo)"}> }[Cost]))

[Lisa_P]

The aggr() function needs a field to aggregate by, this is missing in your example

[everest226]

field is cost