public static function nontaxable_items_exist()
 {
     $addons_in_cart = AC::get_addons_in_cart();
     if (empty($addons_in_cart['nontaxable']) && !AC::load_saved_data('gratuity') && !AC::load_saved_data('donation')) {
         return false;
     }
     return true;
 }
		<tr>
			<td class="padded">Activity Fee (x<?php 
    echo AC::load_saved_data('number_of_registrants');
    ?>
):</td>
			<td><?php 
    echo '$' . $a->fee * AC::load_saved_data('number_of_registrants');
    ?>
</td>
		</tr>
		<?php 
    if (AC::is_addon_in_cart()) {
        ?>

			<?php 
        $addons_in_cart = AC::get_addons_in_cart();
        ?>

			<?php 
        foreach ($addons_in_cart as $addon_group) {
            ?>
				<?php 
            foreach ($addon_group as $addon) {
                ?>
    				<tr>
		    			<td class="padded"><?php 
                echo $addon['title'];
                ?>
 (x<?php 
                echo $addon['quantity'];
                ?>