<inventory>
    <drink>
        <lemonade supplier="mother" id="1" flavor="lemon">
            <price>$2.50</price>
            <amount>20</amount>
        </lemonade>
        <lemonade supplier="store" id="2" flavor="lemon">
            <price>$2.50</price>
            <amount>20</amount>
        </lemonade>
        <pop supplier="store" id="3">
            <price>$1.50</price>
            <amount>10</amount>
        </pop>
    </drink>

    <snack>
        <chips supplier="store" id="4">
            <price>$4.50</price>
            <amount>60</amount>
            <calories>180</calories>
        </chips>
    </snack>
</inventory>