Odie Company manufactures a popular brand of cat repellant known as Cat-B-Gone, which it sells in gallon-size bottles with a spray attachment. The majority of Odie's business comes from orders placed by homeowners who are trying to keep neighborhood cats out of their yards. Odie's operating information for the first six months of the year follows:

Month Number of Bottles Sold Operating Cost January 1.000 $ 8,000 February 1.100 7,700 March 1.300 9,900 April 2.000 14,000 May 2.400 17,250 June 3.000 20.000