> For the complete documentation index, see [llms.txt](https://document.ucall.vn/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://document.ucall.vn/cau-hoi-thuong-gap-1/cau-hoi-thuong-gap/chi-phi.md).

# Chi phí