The chart below shows the average cost of monthly contract for four different mobile cell phones in a European country from January to September 2002 measured in euro

This chart illustrates the average amount of money European callers needed to pay for communication using 4 different kinds of handphones during the surveyed period. 

Generally, it can be seen that there was a dramatic increase in the number of Alpha and Lex users in September. In contrast, Domo and Sim TX consumers decreased considerably during quarter 3.

It is clearly evident that although there was a fluctuation in the amount of money paid for Alpha mobile phone from January to June, it rose dramatically during the last 3 months of the surveyed period, reached 25 euros per month. 

Despite fluctuating from January to June in 2002, money spent on Domo and Sim TX handphones fell nearly 23 and 8 respectively since July.

In spite of a slight decrease in February, the monthly bill for Lex smartphones remained fluctuating from March to September.