product_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
  <data>
    <record model="ir.ui.view" id="product_cost_incl_costs_form">
      <field name="name">product.product_cost_incl_costs.view.form</field>
      <field name="type">form</field>
      <field name="model">product.product</field>
      <field name="priority" eval="800"/>
      <field name="inherit_id" ref="product.product_normal_form_view" />
      <field name="arch" type="xml">
        <field name="cost_price" position="replace">
        </field>
        <field name="list_price" position="replace"/>
        <label string="Cost Price :" align="1.0" position="replace"/>
        <field name="standard_price"
            attrs="{'readonly':[('cost_method','=','average')]}"
            groups="base.group_extended"
            position="replace"/>
        <button name="%(stock.action_view_change_standard_price)d" string="Update"
                    type="action" icon="gtk-execute"
                    attrs="{'invisible':[('cost_method','&lt;&gt;','average')]}"
                    position="replace"/>
        <field name="cost_method" groups="base.group_extended" position="replace">
            <group col="2" colspan="2">
            <field name="list_price"/>
            <field name="cost_method" groups="base.group_extended" />
            <label string="Cost Price :" align="1.0"/>
            <group col="2" colspan="1">
                <field name="standard_price" attrs="{'readonly':[('cost_method','=','average')]}" nolabel="1"/>
                <button name="%(stock.action_view_change_standard_price)d" string="Update"
                    type="action" icon="gtk-execute" attrs="{'invisible':[('cost_method','!=','average')]}"/>
            </group>
          <field name="fixed_cost_price" />
          <field name="cost_price"/>
          </group>
        </field>

      </field>
    </record>

    <record model="ir.ui.view" id="product_cost_incl_costs_tree">
      <field name="name">product.product_cost_incl_costs.view.tree</field>
      <field name="type">tree</field>
      <field name="model">product.product</field>
      <field name="priority" eval="80"/>
      <field name="inherit_id" ref="product.product_product_tree_view" />
      <field name="arch" type="xml">
        <field name="cost_price" position="before">
          <field name="fixed_cost_price"/>
        </field>
      </field>
    </record>
  </data>
</openerp>