The chart illustrates the average monthly contract payment for four different mobile cell phones in a European country between January and September in 2002. Overall, while the Domo cell phone monthly payment was the highest at the beginning of the period,Sim TX mobile phones cost the least, however it took the lead at the end of the period.
All categories showed a clear upward trend except Alpha, despite minor fluctuations. In January, while the Domo had been the dominant on a monthly payment at €15, Sim TX was the cheapest at €5. In June, while the figure for Lex and Sim TX remained unchanged respectively at €13 and 5, the charge of Domo rapidly increased to €20. Domo reached its peak at €25 in July before minimally decreasing to €23.Lex showed the opposite trend before reaching its peak at €18 in September, fell down to €13 in June. However, Sim TX continued its upward consistently and became the dominant at €25 in September.
In contrast, Alpha showed opposite trend. In June, the figure for Alpha was under €10, and in June it reached its peak at under €15 before enormously reducing to €8 in September and became the lowest.
