Changing slideout seal/wiper rubber

[Larry-P]

One of my seals/wipers on the slideout has completely discinigrated & needs to be replaced.
Is this something that a novice like me can do? Does the slideout need to be taken out to replaced this seal/wiper? If I need to take it in to have the work done, what sort of estimated cost do you think it would be?
Has anyone out there actually done this type of work?

Thanks, Larry-P