You can calculate the prices of your offers by combination: you must indicate the price of your offers according to the combination you are looking for (2 adults / 4 adults / 2 adults, 1 child, etc.).
It is important to price all the fares. If a price is missing (for example, the price for one adult and one child), the offer will not be available for this combination.
Example of a screen for entering prices by combination :