If the marginal-cost curve is rising, then so is the average-total-cost curve

In a system in which there is an administered exchange rate, what is the term used when the government sets the rate lower to buy more units of foreign currency?

A) a revaluation B) an appreciation C) a depreciation D) a devaluation

Suppose you have just opened a store to sell espresso machines. Both you and a competing store buy this machine from a manufacturer for $130 each

Your competitor who has a store of the same size as yours is currently selling about 10 machines a month at a price of $200 per machine. You expect to sell about 6 machines a month at a price of $220 per machine. If you lower your price, you expect to make a loss. Which of the following could explain why your competitor is able to profitably sell the machine at a lower price although the cost of purchasing the machine is the same for the both of you? A) The competing store probably has a lower marginal cost of production. B) The competing store's goal is to maximize revenue and not profit. C) The competing store probably has a lower average cost because average fixed cost falls as output increases. D) The competing store probably has a lower average variable cost of production.