how to filter for 5.99 movies

How can I EASILY filter for rental movies that cost less than $5.99 so that I can use my Xfinity Rewards?   It is just silly to have to select every single movie to see how much it costs so that I can utilize the rewards.   There needs to be a filter added for whatever qualifies for the reward ($5.99).    Please note that I am aware that you can search for $3.99 but NOT for $5.99.   I use the reward nearly every month and have yet to find a $3.99 that I was really interested in. 

Please add a $5.99 filter.

Thank you for your responses.