We have a few sample numbers in Run Faster, page 253. A Large Soy Pizza or Myco-Protein Steak is 10 nuyen, while a Large Pizza and a Steak are each 50. A basic Soyburger is 1 nuyen, while a real-beef burger is 5. Soy chicken 5, chicken 20. So ~x5 in price is what you should imagine.