Answer:
80 days
Step-by-step explanation:
For each of the 5 meat choices, there are 4 vegetable choices, so a total of 5·4 = 20 meat/vegetable combinations.
For each of those, there are 4 sauce choices, so a total of ...
20·4 = 80
meat/vegetable/sauce combinations.
If a different one is ordered each day, it will take Alex 80 days before he must repeat an order.
