<form>
  <label>Plan:</label>
  <br>
  <input type="radio" name="plan" value="1"> Plan 1
  <input type="radio" name="plan" value="2"> Plan 2
  <input type="radio" name="plan" value="3"> Plan 3
  <input type="radio" name="plan" value="4"> Plan 4
  <input type="radio" name="plan" value="5"> Plan 5
  <br><br>

  <label>PC:</label>
  <br>
  <select name="pc">
    <option value="10000">10,000</option>
    <option value="20000">20,000</option>
    <option value="25000">25,000</option>
    <option value="30000">30,000</option>
    <option value="40000">40,000</option>
    <option value="50000">50,000</option>
  </select>
  <br><br>

  <label>AGEM:</label>
  <br>
  <select name="agem">
    <option value="1475">1475</option>
    <option value="2950">2950</option>
    <option value="2213">2213</option>
    <option value="4425">4425</option>
    <option value="5900">5900</option>
  </select>
  <br><br>

  <label>Value Slider A:</label>
  <br>
  <input type="range" min="0" max="100" step="1" name="value_slider_a" value="0">
  <br><br>

  <input type="submit" value="Submit">
</form>

<?php
  if(isset($_GET['plan']) && isset($_GET['pc']) && isset($_GET['agem']) && isset($_GET['value_slider_a'])) {
    $plan = $_GET['plan'];
    $pc = $_GET['pc'];
    $agem = $_GET['agem'];
    $value_slider_a = $_GET['value_slider_a'];

    $sum = $pc + $agem;

    echo "Plan: " . $plan . "<br>";
    echo "PC: " . $pc . "<br>";
    echo "AGEM: " . $agem . "<br>";
    echo "Value Slider A: " . $value_slider_a . "<br>";
    echo "Sum of PC and AGEM: " . $sum;
  }
?>