How to add text before and after shortcode in the loop?

Hi There,
I am using CustomPress and adding embed code in loop. Question - how can I add text before and after this shortcode under condition that text will show ONLY if there is value for this custom field. So if my embed code is <?php echo do_shortcode('[ct id="_ct_text_50e866f9d1068" property="value"]'); ?> can I use something like before='$' and after=' per day' to get: $35 per day. Of course value of my custom fields in this case is 35. In case there is no value for this custom field, then nothing will be shown. I am not too good with code or php, but I hope there is some simple solution to add this. Otherwise plugin looks great for now. Thanks a lot.
Regards,
Dean