Hi Stephen,
Thank you for contacting Bing Ads Support. We appreciate the questions our Customers request assistance in and happy to clarify them.
With our conversion tracking you are able to ad Goal Value if the purchase being completed is always the same. You can assign a constant goal value for your goals here through the Bing Ads website. However, you also have the option of creating dynamic, or variable, goal values for both destination goals and event goals by writing your own JavaScript code. This dynamic value is used to calculate the "revenue" of conversions in performance reports. Here is a template for that code:
<script> window.uetq = window.uetq || [];
window.uetq.push({ 'gv': amount });
</script>
To learn how to code dynamic goal values for destination and event goals to add to your webpage, read the "How to set custom goal values" section in Track conversions and other site goals with Universal Event Tracking.
If you need further assistance please don't hesitate to contact us via chat or call 1-800-518-5689 our support team will happy to assist you.
Regards
Priscilla
Bing Ads Support Engineer