I am struggling to create subtotals for grouped break lines. I am looking at Samples Explorer and *almost* seeing what I want, but I don't see the code. I will be having some columns summed, and some columns would be a percentage calculation based on two other column values. Here I see a sum, and an average, but I have no idea how these are accomplished. In addition, it may not be possible, but I'd rather have the totals inside the salmon-colored 'SubTotals' line, rather than on a line below it, which just wastes space. But I haven't found the right magic combination - subtotals for the group, at the bottom, not the top, on the same line as the 'SubTotals' heading. But most of all, this question pertains to *how* one gets the columns to sum, average, and how I'd do a percentage. I presume that this sample is NOT iterating through all the rows and adding them up in code. I presume the grid can do that for me without my having to build a loop. If so, how? Thanks.