apply toggleclass function to element which has already one class

There is Css Code

.ulmenu li a {
                float: left;
                text-decoration: none;
                color: white;
                padding: 11.5px 16px;
                background-color: #808080;
                border: 1px solid #fff;
     }
    .ulmenu li.Tappo a {
        background-color: #F39090;
    }

    .ulmenu li.Sappo a {
        background-color: green;
    }

    .ulmenu li.ABappo a {
        background-color: #ccc;
    }

And Html code

     <div id="Mpanel" class="menu_simple">
                            <ul class="ulmenu">
                                <li><a href="#">R</a></li>
                                <li class="ABappo"><a href="#" style="pointer-events: none; cursor: none">X</a></li>
                                <li><a href="#">R</a></li>
                                <li><a href="#">R</a></li>
                                <li class="Tappo"><a href="#">T</a></li>
                                <li class="Tappo"><a href="#">T</a></li>
                            </ul>
                        </div>

And jquery function for this

     $("#Mpanel").on('click', '.ulmenu li', function () {

            var AppointType = $(this).text();

            if (AppointType == "R") {
                $("#spCsCharge").text("500 Rs");
                $(this).siblings(".Sappo").toggleClass();
                $(this).toggleClass("Sappo");
            } else if (AppointType == "T") {
                $("#spCsCharge").text("1000 Rs");
                $(this).siblings(".Sappo").toggleClass();
                $(this).toggleClass("Sappo Tappo");

            }

        });

constraint is Select only one at a time.

This is appointment application. I have problem that when i select any "R" (for-regular) li this works nice. But for "T"(for-tatkal) it create problem. After un select of selected li "T" class ".Tappo" can not applies. It is look lies just default li.

What changes required in this code? I don't know .please tell me.