Answer Happy

An effective price ceiling in the market for tea will most likely result in a/an decrease in demand for sugar, a complement for tea increase in demand for coffee, a substitute for tea leftward shift in the supply curve of good X shortage of tea surplus of tea
The difference between the price at which a producer would be willing to sell a candy bar and the actual market price that she receives from the sale is best known as Omarginal cost Omarginal utility ability to pay consumer surplus producer surplus