Suppose the world price for a good is 100 and the domestic demand-and-supply curves are given by the following equations: Demand: P = 500-40 Supply: P = 10+30 Round your answers to 2 decimal places if not whole number. Parts e-j assume a 50 percent tariff in place. e. If a tariff of 50 percent is imposed, by how much does consumption change? (if it is a loss include a negative sign in your answer, if it is a gain just type the number in without a sign)