Trying to sum several fields into a total field

Question

Requirement	Year	Qtr. 1	Internal Process	Internal Project	External BSI	External CMMI
CMMI CAM SG 1	2015	7	4	1	0	2

I am trying to sum several fields into one.

 

 This code is giving me an error that these 4 fields do not exist in the current context.

 

 

 

 protected void gvInternalAudit_RowDataBound(object sender, GridViewRowEventArgs e)
        {

            if (e.Row.RowType == DataControlRowType.DataRow)
            {

                Label Qtr1 = (Label)e.Row.FindControl("lblQtr1");

                int lblQtr1 = int.Parse(Q1IntProc.Text) + int.Parse(Q1IntProj.Text) + int.Parse(Q1ExtBSI.Text) + int.Parse(Q1ExtCMMI.Text);

                Qtr1.Text = Qtr1.ToString();

            }

        }