Wow, that seems pretty excessive. When I went to my dealer for my first oil change (just said oil change, vs 5k service, I don't know if that changed what they included) I thought it wasn't that bad, though I'd have to find the slip to remember the cost. I just went in for my 10k service (specified 10k service this time) and I think all-told it was closer to 50. Maybe a bit more but nothing close to 115. Admittedly this is all based on my inefficient memory--wait, just verified (handy thing, online credit card account access) my total for 10k service was about 53-54 dollars. And yes, as I thought I remembered, my 5k oil change was around $25. A little more than I used to pay for my old car at the place I took it, but I thought very reasonable.

$115 is definitely overcharging, whether because they did more than you needed or charged way more on time, or what.