event_booth_sale/views/event_booth_views.xml

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

    <record id="event_booth_view_form_from_event" model="ir.ui.view">
        <field name="name">event.booth.view.form.inherit.sale</field>
        <field name="model">event.booth</field>
        <field name="inherit_id" ref="event_booth.event_booth_view_form_from_event"/>
        <field name="priority">10</field>
        <field name="arch" type="xml">
            <div name="button_box" position="inside">
                <button name="action_view_sale_order" type="object" class="oe_stat_button"
                        icon="fa-usd" groups="sales_team.group_sale_salesman"
                        invisible="not sale_order_id">
                        <div class="o_stat_info">
                            <span class="o_stat_text">Sale Order</span>
                        </div>
                </button>
                <field name="sale_order_id" invisible="1"/>
            </div>
            <div name="button_box" position="after">
                <field name="is_paid" invisible="1"/>
                <widget name="web_ribbon" title="Paid" invisible="not is_paid"/>
            </div>
            <field name="booth_category_id" position="after">
                <field name="currency_id" invisible="1"/>
                <field name="product_id" invisible="not booth_category_id"/>
                <field name="price" widget="monetary" options="{'currency_field': 'currency_id'}"
                       invisible="not booth_category_id"/>
            </field>
            <group name="renter" position="after">
                <group name="sales" groups="base.group_no_one"
                       invisible="not sale_order_line_id">
                    <field name="sale_order_id"/>
                    <field name="sale_order_line_id" readonly="state != 'available'"/>
                </group>
            </group>
            <xpath expr="//sheet" position="inside">
                <notebook groups="base.group_no_one">
                    <page string="Registrations" name="page_registrations">
                        <field name="event_booth_registration_ids" readonly="1"/>
                    </page>
                </notebook>
            </xpath>
        </field>
    </record>

    <record id="event_booth_view_tree_from_event" model="ir.ui.view">
        <field name="name">event.booth.view.tree.from.event.inherit.sale</field>
        <field name="model">event.booth</field>
        <field name="inherit_id" ref="event_booth.event_booth_view_tree_from_event"/>
        <field name="arch" type="xml">
            <field name="partner_id" position="after">
                <field name="currency_id" column_invisible="True"/>
                <field name="price" widget="monetary" options="{'currency_field': 'currency_id'}" sum="Total"/>
            </field>
        </field>
    </record>

    <record id="event_booth_view_search" model="ir.ui.view">
        <field name="name">event.booth.view.search.inherit.sale</field>
        <field name="model">event.booth</field>
        <field name="inherit_id" ref="event_booth.event_booth_view_search"/>
        <field name="arch" type="xml">
            <xpath expr="//field[@name='name']" position="after">
                <field name="sale_order_id"/>
            </xpath>
            <xpath expr="//search/group/filter[@name='group_by_booth_category_id']" position="after">
                <filter name="is_paid" context="{'group_by': 'is_paid'}"/>
            </xpath>
        </field>
    </record>

    <record id="event_booth_view_graph" model="ir.ui.view">
        <field name="name">event.booth.event.booth.view.graph.inherit.sale</field>
        <field name="model">event.booth</field>
        <field name="inherit_id" ref="event_booth.event_booth_view_graph"/>
        <field name="arch" type="xml">
            <xpath expr="//graph" position="inside">
                <field name="price" type="measure"/>
            </xpath>
        </field>
    </record>

    <record id="event_booth_view_pivot" model="ir.ui.view">
        <field name="name">event.booth.event.booth.view.pivot.inherit.sale</field>
        <field name="model">event.booth</field>
        <field name="inherit_id" ref="event_booth.event_booth_view_pivot"/>
        <field name="arch" type="xml">
            <xpath expr="//pivot" position="inside">
                <field name="price" type="measure"/>
            </xpath>
        </field>
    </record>

</data></odoo>