JS service calculator

function calc() { var post = document.getElementById("post"); var kind1 = document.getElementById("kind1"); var kind2 = document.getElementById("kind2"); var time1 = document.getElementById("time1"); var time2 = document.getElementById("time2"); var result = document.getElementById("result"); var price = 0; price += parseInt(post.options[post.selectedIndex].value); price += (kind1.checked == true) ? parseInt(kind1.value) : 0; price += (kind2.checked == true) ? parseInt(kind2.value) : 0; price += (time1.checked == true) ? parseInt(time1.value) : 0; price += (time2.checked == true) ? parseInt(time2.value) : 0; document.getElementById('result').innerHTML = price } 

  <div class="block-calc"> <p>Тип охраны</p> <input class="radio" type="radio" onchange="calc()" value="100" id="kind1" name="radio" required /> <label for="kind1">Вооруженная</label> <input class="radio" type="radio" onchange="calc()" value="65" id="kind2" name="radio" required /> <label for="kind2">Невооруженная</label> <p>Количество постов</p> <select onchange="calc()" id="post"> <option value="0">Выбрать</option> <option value="780">1 пост</option> <option value="1560">2 поста</option> <option value="2340">3 поста</option> <option value="3120">4 поста</option> <option value="3900">5 постов</option> </select> <p>Количество часов в сутки</p> <input class="radio2" type="radio" onchange="calc()" value="30" id="time1" name="radio2" required /> <label for="time1">12 часов</label> <input class="radio2" type="radio" onchange="calc()" value="60" id="time2" name="radio2" required /> <label for="time2">24 часа</label> <div class="cost">Стоимость: <span id="result">0</span> рублей в месяц</div> <div class="za"><a href="#">Заказать</a></div> </div>