Complex sentence: Once free Joe asks Frito whether a time machine exists to return himself to 2005, and Frito agrees to help after Joe promises to open a bank account under Frito's name in Joe's time, which will be worth billions by 2505.
Split into simpler sentences: Once free Joe asks Frito whether a time machine exists to return himself to 2005. Frito claims there is one but only agrees to help after Joe promises to open a bank account under Frito's name in Joe's time, which will be worth billions by 2505.