You need an expression like this:
=SUM(IIF(UCASE(Fields!BillCode.Value) = "EPOC"
OR UCASE(Fields!BillCode.Value) = "EPTX"
OR UCASE(Fields!BillCode.Value) = "STOR"
OR UCASE(Fields!BillCode.Value) = "PARK"
OR UCASE(Fields!BillCode.Value) = "ANTR"
, Fields!Amount.Value
, 0 ))
OR If the BillCode value has other information besides the code then something like this
=SUM(IIF(UCASE(Fields!BillCode.Value) LIKE "*EPOC*"
OR UCASE(Fields!BillCode.Value) LIKE "*EPTX*"
OR UCASE(Fields!BillCode.Value) LIKE "*STOR*"
OR UCASE(Fields!BillCode.Value) LIKE "*PARK*"
OR UCASE(Fields!BillCode.Value) LIKE "*ANTR*"
, Fields!Amount.Value
, 0 ))
To format it to show as currency either set your textbox format to C0
OR Set the Expression =Format(SUM.....,"C0")
OR Right Click and go to textbox properties and set the format
