You'll notice that 4 of the categories have the same price. That is how you'll know which cabins on a particular cruise is part of the sale. For example inside G,inside F, oceanview D, and C2 may show the same price which is the G inside price before the sale. IMO the 4 category upgrade sale is not much of a sale. Occasionally the sale starts at A3 and goes to PH3 but haven't seen that lately. That would be a good deal.