If your are still having doubts about the costs please send us this information: Where you feed multiple frames into one server. We made a fix for this called: Custom slice number. When you have render times under 10 min per frame you lose time and thus credits with each frame. After that, there are maybe startup calculations like simulations, GI, ect. With heavy geometry or objects this can take 1 or 2 min. Since by default every node gets a single frame, each time a frame starts it needs to start Cinema 4D and load the project.
The most common problem is the startup and pre-calculation time. The price calculator is an estimate, this is due to the many variables that come with rendering.
