Economics The equation below shows Ben's benefit of consuming n cups of tea and tea is perfectly divisible and can be consumed at any arbitrary quantity (say, 3.14 cups). Total benefit: TB(n) = 229n - 10n2 Average benefit: AB(n) = 229 - 10n Marginal benefit: MB(n) = 229 - 20n Suppose the price is HKD 30 per cup. Ben's economic surplus from consuming tea would be HKD [Answer]