Passing Multiple Values into Variable

[#1]

i am trying to pass multiple values into variable and clear variable selection

not working

my Variable

vGabbro=DeveloperDesc

i use Expression

=(Sum({$<CargoTypeDesc={'GABBRO'},DeveloperDesc={'$(vGabbro)'}>}EstimatedQuantity))

=(Sum({$<CargoTypeDesc={'GABBRO'},DeveloperDesc={'$(= vGabbro)'}>}EstimatedQuantity))

i tried both the ways

default variable should select all developers but it is not

i miss tick help me please

[#2]

Thank you Sunny

[sunny_talwar]

Not a problem