Statement with more than 1 factor.

[Rizwancheema]

Basically i need help with my GCSEs. I have got the problem that i dont know what statement to use and how to use it. I have got 3 venues with different capacity, so therefore different prices. Now i want to add the prices of the food stalls which have the options of being small medium or large. So if i change the venue i want the prices under small medium and large to be changed as well depending on the venue.