var sum, count;

macro "Total Areas [f9]" {
    requires('1.31g');
    run("Measure");
    sum += getResult('Area', nResults-1);
    count++;
    setResult('Total', nResults-1, sum);
    setResult('Average', nResults-1, sum/count);
    updateResults();
}

macro "Reset Total" {
    sum = 0;
    count = 0;
}