Observable Plot - Stacked Bar Chart totals (sum) at top of each stacked bar

Thank you Fil. That works nicely, now I just need space between that sum and the top of each vertical stacked bar. I have tried with a marginBottom and labelOffset to no avail. Cannot find anything in documentation. Here is what I have so far (note the marginBottom doesn’t work):

    var plot2 = oPlot.plot({
        marginBottom: 5,
        marginTop:20,
        width: 928,
        height: 500,
        x: { label: null },
        y: {
            tickFormat: ".0f",
            tickSpacing: 20,
            label: "PRA ($M)",
            labelAnchor: "center",
            labelOffset: 40
        },
        color:
        {
            legend: "ramp",
            width: 540,
            label: null,
            range: data.Colors
        },
        marks: [
            oPlot.axisX({ ticks: [] }), //to hide xaxis ticks
            oPlot.barY(tidy, {
                x: "fundType",
                y: "total",
                insetLeft: 13,
                insetRight: 13,
                fill: "pra",
                sort: { color: null, x: "-y" }
            }),
            oPlot.text( //this section is what gets us our totals at the top of each vertical stacked bar
                tidy,
                oPlot.groupX(
                {
                    y: "sum",
                    text: (funds) => d3.sum(funds).toLocaleString("en-US", {
                        minimumFractionDigits: 0, // Hide cents (if exact dollar).
                        maximumFractionDigits: 0, // Round to the nearest dollar.
                        marginBottom: 20
                    }),
                },
                { x: "fundType", y: "total", text: "total" }
            )),
            oPlot.textY( //this section gets us our individual bars (by PRA) in each vertical stacked bar
                tidy,
                oPlot.stackY(
                    {
                        x: "fundType",
                        z: "pra",
                        y: "total",
                        text: (d) => (d.total < 50 ? null :
                            (d.total).toLocaleString("en-US", {
                                minimumFractionDigits: 0,
                                maximumFractionDigits: 0
                            })
                        ),
                    }
                )
            )
        ]
    });

And please see attached screenshot for how it looks.