Sales of air conditioning units fluctuated seasonally throughout the year according to a graph. Sales decreased in winter, reached a low point in mid-April, then recovered in May and June. Sales skyrocketed in August, peaking at 5,500 units before plummeting to 1,800 in September. Demand leveled off in early October, plateauing over fall. Sales hit an all-time low in November but surprisingly recovered in December. Overall, sales fluctuated throughout the year.