LC is probably RC. Acres, Pearch and Rods and amount due are correct.
I think the defaulters are on a different list. I have seen some defaulters lists - not for Sligo though, and not on any free sites.
I am actually mostly county Mayo - one part of my family, Roughneen / Rochford were in Kilmoremoy parish, which was then Sligo but is now Mayo. I was just looking through Kilfian and Lacken parish tithes and did see a lot of Murphys - not sure if any of those could have been related.