rowsize = input.Order_Items.count();
for each row1 in input.Order_Items
{
    rowsize = rowsize - 1;
    if(rowsize == 1)
    {
        row.Door_Model = row1.Door_Model;
        row.Door_Color = row1.Door_Color;
        row.Materials  = row1.Materials;
        row.Units      = row1.Units;
    }
}