flectra/addons/stock_account/views/product_views.xml

<?xml version="1.0" encoding="utf-8"?>
<flectra>
    <data>

        <record id="view_category_property_form" model="ir.ui.view">
            <field name="name">product.category.stock.property.form.inherit</field>
            <field name="model">product.category</field>
            <field name="inherit_id" ref="account.view_category_property_form"/>
            <field name="arch" type="xml">
                <group name="account_property" position="inside">
                    <group name="account_stock_property" string="Account Stock Properties" groups="account.group_account_user">
                        <field name="property_stock_account_input_categ_id" domain="[('deprecated', '=', False)]" attrs="{'required':[ ('property_valuation', '=', 'real_time')]}" />
                        <field name="property_stock_account_output_categ_id" domain="[('deprecated', '=', False)]" attrs="{'required':[ ('property_valuation', '=', 'real_time')]}" />
                        <field name="property_stock_valuation_account_id" domain="[('deprecated', '=', False)]" attrs="{'required':[ ('property_valuation', '=', 'real_time')]}"/>
                        <field name="property_stock_journal"/>
                    </group>
                </group>
                <group name="account_property" position="before">
                    <group>
                        <group string="Inventory Valuation">
                            <field name="property_cost_method"/>
                            <field name="property_valuation" groups="account.group_account_user"/>
                        </group>
                    </group>
                </group>
            </field>
        </record>

        <record id="view_template_property_form" model="ir.ui.view">
            <field name="name">product.template.stock.property.form.inherit</field>
            <field name="model">product.template</field>
            <field name="inherit_id" ref="product.product_template_form_view"/>
            <field name="arch" type="xml">
                <data>
                    <field name="list_price" position="after">
                        <field name="valuation" invisible="1" readonly="1"/>
                        <field name="cost_method" invisible="1" readonly="1"/>
                        <field name="property_cost_method" invisible="1"/>
                    </field>
                    <field name="standard_price" position="replace">
                        <div class="o_row">
                            <field name="standard_price"
                                attrs="{'readonly':[('valuation','=','real_time')]}"
                                widget='monetary' options="{'currency_field': 'currency_id', 'field_digits': True}" />
                            <button string="Update Cost" type="action"
                            name="%(action_view_change_standard_price)d"
                            attrs="{'invisible':['|', '|', ('valuation','!=', 'real_time'), ('cost_method', 'not in', ['average', 'standard']), ('product_variant_count', '>', 1)]}"
                            class="oe_link oe_read_only" colspan="2"/>
                        </div>
                    </field>
                    <group name="accounting" position="inside">
                        <group name="property_inventory_valuation"  string="Stock Valuation" attrs="{'invisible': ['|', ('type','=','service'), ('valuation', '!=', 'real_time')]}" groups="account.group_account_user">
                            <field name="property_valuation" invisible="1"/>
                            <field name="property_stock_account_input"
                                domain="[('deprecated', '=', False)]"/>
                            <field name="property_stock_account_output"
                                domain="[('deprecated', '=', False)]"/>
                        </group>
                    </group>
                </data>
            </field>
        </record>

        <record id="product_variant_easy_edit_view_inherit" model="ir.ui.view">
            <field name="name">product.product.product.view.form.easy.inherit</field>
            <field name="model">product.product</field>
            <field name="inherit_id" ref="product.product_variant_easy_edit_view"/>
            <field name="arch" type="xml">
                <data>
                    <field name="standard_price" position="after">
                        <field name="valuation" invisible="1"/>
                        <field name="cost_method" invisible="1"/>
                    </field>
                    <field name="standard_price" position="after">
                        <button string="Set standard cost" type="action"
                            name="%(action_view_change_standard_price)d"
                            attrs="{'invisible':['|',('valuation','!=', 'real_time'), ('cost_method', 'not in', ['standard'])]}"
                            class="oe_link oe_read_only" colspan="2"/>
                    </field>
                    <field name="standard_price" position="after">
                        <button string="Set standard cost" type="action"
                            name="%(action_view_change_standard_price)d"
                            attrs="{'invisible':['|',('valuation','!=', 'real_time'), ('cost_method', 'not in', ['average'])]}"
                            class="oe_link oe_read_only" colspan="2"/>
                    </field>
                </data>
            </field>
        </record>

        <record id="product_valuation_action" model="ir.actions.act_window">
            <field name="name">Product Valuation</field>
            <field name="type">ir.actions.act_window</field>
            <field name="res_model">product.product</field>
            <field name="view_mode">tree,form</field>
            <field name="view_type">form</field>
            <field name="view_id" ref="view_stock_product_tree2"/>
            <field name="domain">[('type', '=', 'product'), ('qty_available', '!=', 0)]</field>
            <field name="context">{'company_owned': True}</field>
            <field name="help" type="html">
                <p class="oe_view_nocontent_create">
                    If there are products, you will see its name and valuation. 
                </p>
            </field>
        </record>
   </data>
</flectra>