Sounds simple enough, i wouldn't be a problem to do. I would need to know how long are the videos thou. Depending on the amount of material this would be done within 1 to 4 days.
Relevant Skills and Experience
Editing, Sound design, Did tons of sound syncs, Sound fixes, Currently work in a firm where i film and edit all of our promotional material, (syncing included), Color grading.
Proposed Milestones
$500 USD - Will sync the sound from the lavs, sync the camera in intervals that you set, insert the slides.
Additional Services Offered
$50 USD - Color grade if needed, sound reparation if needed.
I mean its a pretty straight forward job, i would only want to know your preference for the edit.