Final answer:
The number of memberships that can be sold per guest check on a cruise ship depends on the number of guests and the type of membership offered.
Step-by-step explanation:
In the given question, the concept of cashless onboard transactions on a cruise ship is being discussed.
In this case, the number of memberships that can be sold per guest check depends on the number of guests on the cruise and the type of membership being offered.
For example, if there are 60 single travelers and 70 couples on the cruise, the total number of guest checks will be 60 + (70 * 2) = 200 guest checks.
The number of memberships that can be sold per guest check will depend on the marketing strategy and the preferences of the guests.