def init_sum_scheme(sum_scheme)
        row_scheme, col_scheme = sum_scheme.split(',') unless sum_scheme.nil?

        unless row_scheme.nil?
          @sum_row_title, @sum_row = row_scheme.split(':') unless row_scheme.empty?
        end
        
        @sum_row.nil? ? @sum_row = 0 : @sum_row = @sum_row.to_i
        @sum_row_title = 'Total' if @sum_row_title.nil? 

        col_scheme.nil? ? @sum_col_title = 'Total' : @sum_col_title = col_scheme
        @sum_col = 0
      end
def init_sum_scheme(sum_scheme)
        row_scheme, col_scheme = sum_scheme.split(',') unless sum_scheme.nil?

        unless row_scheme.nil?
          @sum_row_title, @sum_row = row_scheme.split(':') unless row_scheme.empty?
        end
        
        @sum_row.nil? ? @sum_row = 0 : @sum_row = @sum_row.to_i
        @sum_row_title = 'Total' if @sum_row_title.nil? 

        col_scheme.nil? ? @sum_col_title = 'Total' : @sum_col_title = col_scheme
        @sum_col = 0
      end
Initializes the sum row title an positions as well as the sum column
 title and position