Use function in Set Property message scenario

Summary:

We have a requirement to provide Technician the option to add a time_increment to the already existing total_wait_time value.

Content (required):

Can we use Message Scenarios -> Set Property -> Body section to perform a sum of the two properties?

Many Thanks!

Version (include the version you are using, if applicable):

22D

Code Snippet (add any code snippets that support your topic, if applicable):

This expression will only concatenate the values of the two properties

{exprnum_CC_WAIT_TIME} + {exprnum_CC_ADD_WAIT_TIME}