Count submitted radio buttons and change confirmation

<?php
// http://www.gravityhelp.com/forums/topic/advanced-conditional-logic#post-185385
// change the 370 here to your form ID
add_filter('gform_confirmation_370', 'add_up_radio_choices', 10, 4);
function add_up_radio_choices($confirmation, $form, $lead, $ajax){

    // initialize and empty array to hold the questios we want to count the answers of
    $questions = array();

    // my questions were inputs 1 to 10 in the $lead array
    // add each answer from $lead[1] to $lead[10] to the questions array
    for($i = 1; $i <= 10; $i++)
        $questions[] = $lead[$i];

    // this will count the frequency of each answer in the array of questions
    $count = array_count_values($questions);

    // initialize a, b and c in case no one selects them as an answer
    $a = 0;
    $b = 0;
    $c = 0;

    // make sure the keys exist in the array, i.e. someone submitted that option as an answer
    if(array_key_exists('A', $count))
        $a = $count['A'];
    if(array_key_exists('B', $count))
        $b = $count['B'];
    if(array_key_exists('C', $count))
        $c = $count['C'];

    // if we had mostly A
    if ($a > $b && $a > $c) {
        $confirmation = "<div id='gforms_confirmation_message' class='gform_confirmation_message_370'><p>You selected mostly A.</p></div>";
    }

    // if we had mostly B
    elseif ($b > $a && $b > $c) {
        $confirmation = "<div id='gforms_confirmation_message' class='gform_confirmation_message_370'><p>You selected mostly B.</p></div>";
    }

    // if we had mostly C
    elseif ($c > $a && $c > $b) {
        $confirmation = "<div id='gforms_confirmation_message' class='gform_confirmation_message_370'><p>You selected mostly C.</p></div>";
    }

    // what if none of the above were true? what if there were equal numbers for some choices?
    else {
        $confirmation = "<div id='gforms_confirmation_message' class='gform_confirmation_message_370'><p>I didn't plan for this.</p></div>";
    }

    // add the total for each choice to the confirmation for debugging
    $confirmation .= "<div>A: $a<br />B: $b<br />C: $c<br /></div>";

    // always return the confirmation
    return $confirmation;
}