* Add min and max for age 1 validation
* Add retirement value check column to the sales table
* Add retirement value check question and page
* Add retirement value check pages to household characteristics
* Reuse soft validations for retirement in sales
* Update person_indexes
* Add old_persons_shared_ownership validation
* Display the retirement value check in correct places depending on the joinpur value
* Update page IDs
* It's always joint purchase if age 2 is displayed
* lint
* lint
* Enable multiple inferred check answers values
* lint and add new conditions to check answers for age1
* Rename method
* Refactor inferred answer value
* rebase update
* update inferred_check_answers_value after rebase
* Move the method to private
* Add a missing test
* rebase changes
* Add prefers not to say as the displayed value for all household members
* update [0] to .first
* replace [0] with .first
* Display person 2, 3, 4 age question if their details are known
* Infer check answers value for age questions as 'Not known'
* Hide age known question in check answers if it is answered yes or no
* Add card numbers to household characteristics question
* Update gender identity depends on
* lint
* Add a field to completed sales log in factory
* Update person 1 gender identity to depend on the people count
* Do not show buyer 2 questions if it is not a joint purchase