Ninja Forms hide addon costs equal to zero

gistfile1.txt

<?php

add_filter( 'wc_nf_addons_format_cart_item_price' , 'wc_ninja_forms_hide_zero_price' );

function wc_ninja_forms_hide_zero_price( $value ) {

    $hide_price = ' (' . wc_price( '0.00' ) . ')';

    if ( $value == $hide_price ) {
        return '';
    } else {
        return $value;
    }

}