Does the price actually depend on whether you are using a GPU or simply an instance you choose? Let's say you need to do some work that will require a GPU, so you spend 5 hours setting up an environment, doing some light programming/experiments in an Jupyter notebook, downloading datasets, looking at the data. Then you train for an hour then one more hour looking at the data, drinking coffee, stuff like that. Then train again.

So you were using the environment for 10 hour, but only 3 of them in total were using GPU. Will you pay for 10 hours of GPU usage, or will only 3h be expensive and 7h cheap?