Hi Luke,
Thanks for reaching out! I took a look at the link you sent and clicked through a few events…Could you please send me a link to an event where this is happening, along with a screenshot of the settings for that event on the event edit screen (including the cost field)? I would also recommend upgrading to the latest version of The Events Calendar – 4.6.4.
If you would like to hide the cost field altogether, you could remove it from the templates you want to hide it from. You can find the single event template at wp-content/plugins/the-events-calendar/src/views/single-event.php. First follow these instructions to copy the template into your child theme for editing, then look for the following:
<?php if ( tribe_get_cost() ) : ?>
<span class="tribe-events-cost"><?php echo tribe_get_cost( null, true ) ?></span>
<?php endif; ?>
Thanks,
Jennifer