If an account's aggregate amount is null, return 0
If an account's aggregate amount is null, return 0

jwakely/ledger,duncanmortimer/ledger,jwakely/ledger,duncanmortimer/ledger,jwakely/ledger,duncanmortimer/ledger,jwakely/ledger,ledger/ledger,duncanmortimer/ledger,duncanmortimer/ledger,ledger/ledger,duncanmortimer/ledger,ledger/ledger,ledger/ledger,afh/ledger,jwakely/ledger,duncanmortimer/ledger,paulbdavis/ledger,paulbdavis/ledger,paulbdavis/ledger,paulbdavis/ledger,paulbdavis/ledger,paulbdavis/ledger,jwakely/ledger,afh/ledger,paulbdavis/ledger,afh/ledger,afh/ledger,afh/ledger,jwakely/ledger,ledger/ledger