How to get Value from a label or hidden Field if it is being set dynamically on a form?

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ASP.NET

MVC4

This code is in my Index View.

<pre><tr>
                <td class="Label">
                    @Html.Label("*DropDown")
                </td>
                <td>

                   
                    @Html.DropDownList("DropDown",
                        new List<SelectListItem>
                        { new SelectListItem {Text = "Tina", Value="1"},
                          new SelectListItem {Text = "Mina", Value="2"},
                          new SelectListItem {Text = "Jina", Value="3"},
                          new SelectListItem {Text = "Pina", Value="4"}, 
                        }, "Select one", new { @class = "ddl", })
                </td>
            </tr>


            <tr>
                <td class="Label">
                    @Html.LabelFor(m => m.PPC)
                </td>
                <td>
                   @Html.Hidden("PPC", null, new { id = "ppc1"})
                   @Html.Label("PPC", new { id = "ppc" })
                </td>
            </tr>

basically i want to populate my label and hidden field on selection of the DropDown automatically.
And to populate my Label and hidden field i am using this jquery.

$(document).ready(function () {

       $('#DropDown').change(function () {

           var valueOfDDl = $("#DropDown option:selected").text();


           if (valueOfDDl == 'Tina') {
               $("#ppc").text("1 MW");
               $("#ppc1").text("1 MW");
           }
           else if (valueOfDDl == 'Mina') {
               $("#ppc").text("1.5 MW");
               $("#ppc1").text("1.5 MW");
           }
           else if (valueOfDDl == 'Jina') {
               $("#ppc1").text("2 MW");
               $("#ppc").text("2 MW");
           }
           else if (valueOfDDl == 'Pina') {
               $("#ppc").text("2.5 MW");
               $("#ppc1").text("2.5 MW");
           }
       })

I am successfuly setting the value
but when i tried to access that value in controller xyz it is null

I have tried Request.Form["PPC"].Tostring();
i have even passed it to my controller like this

public ActionMethod xyz(string PPC)
{
Viewbag.ppc = ppc;
}

I have do have a ppc field in my model so i also tried

Viewbag.ppc = model.PPC;

But nothing seems to work.

*
One more thing i want the label to be empty but when i load my page it shows PPC as default value and if i put simple Html label validations is not working.