Lisa Simpson sells beauty supplies. Her annual demand for a particular skin lotion is 1,000 units. The cost of placing an order is $20, while the holding cost per unit per year is 10 percent of the cost. This item currently costs $10 if the order quantity is less than 300. For orders of 300 units or more, the cost falls to $9.80. To minimize total cost, how many units should Lisa order each time she places an order

4. understanding different policy options to correct for negative externalities carbon dioxide emissions have been linked to global warming. the following table lists some possible public policies aimed at reducing the amount of carbon dioxide in the air. for each policy listed, identify whether it is a command-and-control policy (regulation), tradable permit system, corrective subsidy, or corrective tax. public policy command-and-control policy tradable permit system corrective subsidy corrective tax the government charges factories $110 for every ton of carbon dioxide they emit. the government orders every factory to adopt a new technology, which reduces carbon-dioxide emissions into the atmosphere. trees take carbon dioxide out of the air and convert it to oxygen, so the government funds a tree-planting initiative by offering $110 to any citizen who plants a tree. the government limits total carbon-dioxide emissions by all factories to 180,000 tons per month. each individual factory is given the right to emit 140 tons of carbon dioxide, and factories may buy and sell these rights in a marketplace.