The graph in figure 1 shows the annual sales of Southern Book Store between January to December for the year 2005, 2006 and 2007.
In general, the annual sales of Southern Book Store are remaining the same from January to December in 2005. The annual sale increase and decrease slightly throughout the year 2006. In 2007, the annual sale decreased until March at which point the sale increased rapidly before it remain the same between August to December.
The annual sale in 2005 remains the same which is 2000 copies between Januarys to December. In 2006, the sale increase from 4000 copies for January to 5000 copies in February. The sale rise and fall between March to September and the highest sale are 5500 copies in April while, the lowest sale is 3500 copies in Jun. Annual sales decreases between September to December from 5000 copies to 3500 copies in year 2006. The annual sale for year 2007 start from 3000 copies in January decrease to 2000 copies in March. The annual sale sharply increases from 2000 copies in March to 8000 copies in August and the sale remains constant between Augusts to December for the year 2007.
In summary, we can see that the annual sale of Southern Book Store is different in 2005, 2006 and 2007. This is because of the economic situation in our country in each year that effect the sales as the sales depends on the costumer finance.