How to reference a value from earlier in your code?

Hello there. Im taking a intro to programming and logic class. Im working on my final project. We have to write a program that makes reservations to a hotel. You ask if they want to make a reservation, how many nights, what kind of suite, if they need transportation, ect. Then at the very end you need to use all of there answers to create a bill for them. Maybe it is just the stress of finals, or the fact that I am HORRIBLE at programming. But for the life of me I can not figure out how to make it work. Ive got the whole program set up except the final part where I need to do the calculations.

So to sum things up I guess my question is, how do I get those responses that were entered earlier, so I can use them for the calculations.

If you could help me out I would appreciate it so much. Thank you!!