If retail stores experience a decrease in revenues during this holiday season, then either attitudes toward extravagant gift-giving have changed or prices have risen beyond the level most people can afford  If attitudes have changed, then we all have something to celebrate this season  If prices have risen beyond the level most people can afford, then it must be that salaries have not kept pace with rising prices during the past year
Assume the premises above to be true
Prices in retail stores have not risen beyond the level that most people can afford during this holiday season.