product_pricelist_demo.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <data noupdate="1">
        <record id="item1" model="product.pricelist.item">
            <field name="base">list_price</field>
            <field name="applied_on">1_product</field>
            <field name="pricelist_id" ref="product.list0"/>
            <field name="product_tmpl_id" ref="product.product_product_11_product_template"/>
            <field name="price_discount">15</field>
            <field name="min_quantity">3</field>
            <field name="compute_price">formula</field>
        </record>
    </data>
</odoo>