pricelist_per_product/product_view.xml

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
  <data>

    <record id="product_template_form_view" model="ir.ui.view">
        <field name="model">product.template</field>
        <field name="inherit_id" ref="product.product_template_form_view"/>
        <!-- There is a position="replace" then we add a priority -->
        <!-- <field name="priority" eval="100"/> -->
        <field name="arch" type="xml">
             <xpath expr="//page[@string='Information']//field[@name='list_price']"
                   position="replace">
            </xpath>
            <xpath expr="//page[@string='Sales']/group[@name='sale']" position="before">
                <group>
                    <field name="list_price" string="Public price" invisible="1"/>
                    <field name="pricelist_item_ids" colspan="4" nolabel="1"
                       domain="[('price_version_id.pricelist_id.type', '=', 'sale'),
                ('price_version_id.price_grid', '=', True)]">
                        <tree editable="top" create="0" delete="0">
                            <field name="price_version_id"/>
                            <field name="product_id" string="Product Variant"
                                   domain="[('product_tmpl_id', '=', parent.id)]"
                                   help="Define a price for this variant according to attribute price extra if any (tab 'Variants')" invisible="1"/>
                            <field name="price_surcharge" string="Valor"/>
                            <field name="date_end" invisible="1"/>
                            <field name="price_discount" invisible="1"/>
                            <field name="sequence" invisible="1"/>
                            <field name="base" invisible="1"/>
                        </tree>
                    </field>
                </group>
            </xpath>
        </field>
    </record>

  </data>
</openerp>