index.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <script src="https://unpkg.com/vue"></script>
  <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Simple table</title>
</head>
<body>
  <h2 style="text-align:center;">Simple table for TR Logic LLC</h2>
  <div class="panel-body" id="app">
  <table style="margin:0 auto; width: 600px;"class="table table-hover table-bordered">
    <thead align="left">
      <th>Наименование</th>
      <th>Количество</th>
      <th>Цена</th>
      <th></th>
    </thead>
     <tbody>
        <tr v-for="(item, index) in items">
          <td><input class="form-control" v-model.number="item.name" size="25"></td>
          <td><input class="form-control" v-model.number="item.qty" size="1"></td>
          <td><input class="form-control" v-model.number="item.price" size="3"></td>
          <td>
            <button class="btn btn-primary btn-xs" @click="addRow(index)">Добавить</button>
            <button class="btn btn-danger btn-xs" @click="removeRow(index)">Удалить</button>
        </td>
       </tr>
       <tr>
         <td class="table-total"><strong>Итог</strong></td>
         <td></td>
         <td><strong>{{total}}</strong></td>
       </tr>
     </tbody>
   </table>
 </div>
<script>
var app = new Vue({
el: '#app',
    data: {
      // Начальные значения
      items: [
      {name: "Товар 1", qty: 12, price: 97 },
      {name: "Товар 2", qty: 5, price: 44 },
      {name: "Товар 3", qty: 11, price: 11 },
      {name: "Товар 4", qty: 2, price: 31 }
      ],
    },
    computed: {
      // Итог
      total() {
        return this.items.reduce((total, item) => {
          return total + item.qty * item.price;
        }, 0);
      }
  },
  methods: {
          // Добавление ряда
      addRow(index) {
        this.items.splice(index + 1, 0, {
          qty: 1,  price: 0
          });
      },
            // Удаление ряда
      removeRow(index) {
          this.items.splice(index, 1);
      }
  }
});
</script>
</body>
</html>