JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://cloud.github.com/downloads/SteveSanderson/knockout/knockout-2.0.0.js"></script>
<form class="giftListEditor" data-bind="submit: save">
    <!-- Our other UI elements, including the table and ‘add’ button, go here -->

    <p>You have asked for <span data-bind="text: gifts().length">&nbsp;</span> gift(s)</p>
    <table>
        <tbody  data-bind="foreach: gifts">
            <tr>
                <td>Gift name: <input data-bind="value: Title"/></td>
                <td>Price: $ <input data-bind="value: Price"/></td>
                <td>Company: <select data-bind="options: $root.companies, optionsText: 'Name', optionsValue: 'Id', value: CompanyId"/></td>
                <td>CompanyId: <span data-bind="text: CompanyId"></span></td>
                <td><a href="#" data-bind="click: $root.removeGift">Delete</a></td>
            </tr>
        </tbody>
    </table>
    <button data-bind="click: addGift">Add Gift</button>
    <button data-bind="enable: gifts().length > 0" type="submit">Submit</button>
</form>

JavaScript

var initialData = [
    { Title: ko.observable('Item 1'), Price: ko.observable(56), CompanyId: ko.observable(1) },
    { Title: ko.observable('Item 2'), Price: ko.observable(60), CompanyId: ko.observable(2) }, 
    { Title: ko.observable('Item 3'), Price: ko.observable(70), CompanyId: ko.observable(2) }
];

var initialCompanies = [
    { Id: 1, Name: "Comp 1" },
    { Id: 2, Name: "Comp 2" },
    { Id: 3, Name: "Comp 3" }
];

var viewModel = {
    gifts: ko.observableArray(initialData),
    companies: initialCompanies,

    addGift: function() {
        this.gifts.push({
            Title: "",
            Price: "",
            Company: { Id: "", Name: "" }
        });
    },
    removeGift: function($gift) {
        viewModel.gifts.remove($gift);
    },
    save: function() {
        console.log(ko.toJS(viewModel.gifts));
    }
};

ko.applyBindings(viewModel, document.body);