What is the meaning of phrase that was all there to it?

The phrase "that was all there was to it" is a common expression meaning that's all there is to say about it, that's the end of the story, or that's all there is to it. It indicates that there is nothing more to add or explain.

Here are some examples of how it might be used:

* "I told him I couldn't go, and that was all there was to it." (Meaning: The speaker made their decision and there's no need to further discuss it.)

* "The recipe was simple: mix the ingredients, bake for 30 minutes, and that was all there was to it." (Meaning: The recipe was straightforward with no complicated steps.)

* "He explained his reasons, and that was all there was to it." (Meaning: The explanation was complete and there was no need for further explanation.)

The phrase emphasizes the finality and simplicity of a situation, often implying that the matter is closed and requires no further discussion.