Price Floor, handles how "low" the price of a product should be, from the word "FLOOR" (nasa ibaba, mababa, low)
Price Ceiling, handles how "high" the price of a product should be, from the word "CEILING" (nasa itaas, mataas, high)
Price Floor handles how low the price of a product should be, while Price Ceiling is the opposite of Price Floor, they handles how high the price of a product should be.