Q. Doc's bar serves lots of beer, but also carries fine single malt whiskeys. He approximates his annual demand for a certain whiskey to be 1000 cases (he sells a lot of whiskey). His approximate d cost to carry 1 case of whiskey is $52 dollars per case per year. He approximates that it costs $21 to place a whiskey order. Explain how many cases should doc order each time he places an order?