Thanks Petko!

I'm able to calculate the sum of selected rows.

Also, I'm using summaries attribute on igx-column like as below : 

[summaries]="sumSummary"

class SumSummary extends IgxNumberSummaryOperand {
  constructor() {
    super();
  }

  public operate(data?: any[]): IgxSummaryResult[] {
    const result = [];
    result.push({
      key: "sum",
      label: "",
      summaryResult: IgxNumberSummaryOperand.sum(data)
    });
    return result;
  }
}

is there any way where i can assign my custom selected rows sum to the summeries.
Do i need to call operate function explicitly? OR
showing sum on custom div instead of using summeries attribute would be easier?


Thanks,
Akshay