German for Beginners #8: Making Plans

Tanja and Lisa discuss their plans for the evening, considering watching the LEGO Batman movie and having dinner. They talk about their food preferences and concerns about diet. However, plans change due to other commitments, leading to a discussion about homework and the possibility of meeting another day. Eventually, they finalize their plans to watch the movie and have dinner, agreeing on who will pay for what.

What alternative does one character suggest instead of going to the movies?

What is the final agreement made between the characters regarding payment?