Template
$NetCashFlow = ($NetCashFlowOperatingActivities + $NetCashFlowFinancingActivities + $NetCashFlowInvestingActivities)
proof:NetCashFlow
proof:NetCashFlowOperatingActivities
proof:NetCashFlowFinancingActivities
proof:NetCashFlowInvestingActivities
$Assets_BalanceStart + $NetCashFlow = $Assets_BalanceEnd
proof:Assets
proof:NetCashFlow