diff --git a/lib/axlsx/stylesheet/num_fmt.rb b/lib/axlsx/stylesheet/num_fmt.rb
index 8276ba18..1072d18a 100644
--- a/lib/axlsx/stylesheet/num_fmt.rb
+++ b/lib/axlsx/stylesheet/num_fmt.rb
@@ -73,5 +73,14 @@ def to_xml_string(str = '')
       serialized_tag('numFmt', str)
     end
 
+    # Override to avoid removing underscores
+    def serialized_attributes(str = '', additional_attributes = {})
+      attributes = declared_attributes.merge! additional_attributes
+      attributes.each do |key, value|
+        str << "#{Axlsx.camel(key, false)}=\"#{Axlsx.booleanize(value)}\" "
+      end
+      str
+    end
+
   end
 end
diff --git a/lib/axlsx/workbook/worksheet/pivot_table.rb b/lib/axlsx/workbook/worksheet/pivot_table.rb
index 0d5f34e8..fffced0b 100644
--- a/lib/axlsx/workbook/worksheet/pivot_table.rb
+++ b/lib/axlsx/workbook/worksheet/pivot_table.rb
@@ -25,10 +25,20 @@ def initialize(ref, range, sheet, options={})
       @data = []
       @pages = []
       @subtotal = nil
+      @no_subtotals_on_headers = []
+      @style_info = {}
       parse_options options
       yield self if block_given?
     end
 
+    # Defines the headers in which subtotals are not to be included
+    # @return[Array]
+    attr_accessor :no_subtotals_on_headers
+
+    # Style info for the pivot table
+    # @return[Hash]
+    attr_accessor :style_info
+
     # The reference to the table data
     # @return [String]
     attr_reader :ref
@@ -163,7 +173,7 @@ def to_xml_string(str = '')
       str << (  '<location firstDataCol="1" firstDataRow="1" firstHeaderRow="1" ref="' << ref << '"/>')
       str << (  '<pivotFields count="' << header_cells_count.to_s << '">')
       header_cell_values.each do |cell_value|
-        str <<   pivot_field_for(cell_value)
+        str <<   pivot_field_for(cell_value,!no_subtotals_on_headers.include?(cell_value))
       end
       str <<   '</pivotFields>'
       if rows.empty?
@@ -200,12 +210,21 @@ def to_xml_string(str = '')
       unless data.empty?
         str << "<dataFields count=\"#{data.size}\">"
         data.each do |datum_value|
-          str << "<dataField name='#{@subtotal} of #{datum_value[:ref]}' fld='#{header_index_of(datum_value[:ref])}' baseField='0' baseItem='0'"
+          # The correct name prefix in ["Sum","Average", etc...]
+          str << "<dataField name='#{(datum_value[:subtotal]||'')} of #{datum_value[:ref]}' fld='#{header_index_of(datum_value[:ref])}' baseField='0' baseItem='0'"
           str << " subtotal='#{datum_value[:subtotal]}' " if datum_value[:subtotal]
           str << "/>"
         end
         str << '</dataFields>'
       end
+      # custom pivot table style
+      unless style_info.empty?
+        str << '<pivotTableStyleInfo'
+        style_info.each do |k,v|
+          str << ' ' << k.to_s << '="' << v.to_s << '"'
+        end
+        str << ' />'
+      end
       str << '</pivotTableDefinition>'
     end
 
@@ -241,13 +260,17 @@ def header_index_of(value)
 
     private
 
-    def pivot_field_for(cell_ref)
+    def pivot_field_for(cell_ref, subtotal=true)
       if rows.include? cell_ref
-        '<pivotField axis="axisRow" compact="0" outline="0" subtotalTop="0" showAll="0" includeNewItemsInFilter="1">' + '<items count="1"><item t="default"/></items>' + '</pivotField>'
+        if subtotal
+          '<pivotField axis="axisRow" compact="0" outline="0" subtotalTop="0" showAll="0" includeNewItemsInFilter="1">' + '<items count="1"><item t="default"/></items>' + '</pivotField>'
+        else
+          '<pivotField axis="axisRow" compact="0" outline="0" subtotalTop="0" showAll="0" includeNewItemsInFilter="1" defaultSubtotal="0">' + '</pivotField>'
+        end
       elsif columns.include? cell_ref
         '<pivotField axis="axisCol" compact="0" outline="0" subtotalTop="0" showAll="0" includeNewItemsInFilter="1">' + '<items count="1"><item t="default"/></items>' + '</pivotField>'
       elsif pages.include? cell_ref
-        '<pivotField axis="axisCol" compact="0" outline="0" subtotalTop="0" showAll="0" includeNewItemsInFilter="1">' + '<items count="1"><item t="default"/></items>' + '</pivotField>'
+        '<pivotField axis="axisPage" compact="0" outline="0" subtotalTop="0" showAll="0" includeNewItemsInFilter="1">' + '<items count="1"><item t="default"/></items>' + '</pivotField>'
       elsif data_refs.include? cell_ref
         '<pivotField dataField="1" compact="0" outline="0" subtotalTop="0" showAll="0" includeNewItemsInFilter="1">' + '</pivotField>'
       else
diff --git a/test/workbook/worksheet/tc_pivot_table.rb b/test/workbook/worksheet/tc_pivot_table.rb
index 3c42d605..08ad49e6 100644
--- a/test/workbook/worksheet/tc_pivot_table.rb
+++ b/test/workbook/worksheet/tc_pivot_table.rb
@@ -67,7 +67,27 @@ def test_add_pivot_table_with_options_on_data_field
     assert_equal([{:ref=>"Sales", :subtotal => 'average'}], pivot_table.data)
   end
 
-  def test_header_indices
+  def test_add_pivot_table_with_style_info
+    style_info_data = { :name=>"PivotStyleMedium9", :showRowHeaders=>"1", :showLastColumn=>"0"}
+    pivot_table = @ws.add_pivot_table('G5:G6', 'A1:E5', {:style_info=>style_info_data}) do |pt|
+      pt.rows = ['Year', 'Month']
+      pt.columns = ['Type']
+      pt.data = ['Sales']
+      pt.pages = ['Region']
+    end
+    assert_equal(style_info_data, pivot_table.style_info)
+    shared_test_pivot_table_xml_validity(pivot_table)
+  end
+
+  def test_add_pivot_table_with_row_without_subtotals
+    pivot_table = @ws.add_pivot_table('G5:G6', 'A1:D5', {:no_subtotals_on_headers=>['Year']}) do |pt|
+      pt.data = ['Sales']
+      pt.rows = ['Year','Month']
+    end
+    assert_equal(['Year'], pivot_table.no_subtotals_on_headers)
+  end
+
+ def test_header_indices
     pivot_table = @ws.add_pivot_table('G5:G6', 'A1:E5')
     assert_equal(0,   pivot_table.header_index_of('Year'   ))
     assert_equal(1,   pivot_table.header_index_of('Month'  ))