The graph in figure 2 shows the total sales of reading material for four quarter in year 2007.
In general, sales of reading material which are best seller, text book and magazine increase in every quarter of year 2007. While workbook sales remain at the same level except in 2nd quarter due to non-examination season as the entire student have to focus on co-curriculum.
Sales of best seller reading material increase from 2000 copies in 1st quarter to 7000 copies in 2nd quarter. The sales of best seller reading materials rapidly increase to 14 000 copies in the 3rd quarter and remain same until the 4th quarter of year 2007. Sales of textbook reading material is 3000 copies for 1st and 2nd quarter but slightly increase to 5000 copies in 3rd quarter and 7000 copies in 4th quarter of the year 2007. Workbook sales fall from 2000 copies in 1st quarter to 1000 copies in 2nd quarter but rise to the actual number of sale which is 2000 copies in 3rd quarter and 4th quarter of the year 2007. Magazine is the lowest sales as the bookstore manage to sale 500 copies in 1st and 2nd quarter in the year 2007. The sales of magazine grow slowly to 1000 copies in 3rd and 4th quarter of the year 2007.
In summary, we can see that the sales of reading material increase in each quarter of the year 2007. Importance of the reading material in each quarter affected the sale of the reading material.