Weekend Omelettes at Bernie's
Bernie's Breakfast Buffet offers omelettes as part of their buffet on Saturday and Sunday. They offer 6 different toppings that you can have on your omelette. For each topping, you can either not have that topping, have a single serving, or have a double serving. How many different choices of omelettes are offered?
Details and assumptions
The English term single helping and single serving refers to receiving an individual portion of food. I have changed the term to single serving, to reduce confusion amongst non-native speakers.