In the highly competitive TV manufacturing industry, a new innovation makes it possible to cut the average cost of a $50-$inch LCD TV from $$1,000$ to $$600.$ Most TV manufacturers quickly adopt this new innovation, earning massive short$-$run profits. In the long run, the price of a $50-$inch LCD TV will be $$\{\}.($Do not type $"$$$"$ in the box.$)$

In the highly competitive flash drive industry, a new innovation makes it possible to cut the average cost of an $64-$gigabyte flash drive, small enough to fit on your keychain, from $$5$ to $$4.$ In the long run, the price of an $64-$gigabyte flash drive be $$\{\}.($Do not type $"$$$"$ in the box.$)$