The chart given compares the amount of monthly payment of contracts for four different types of mobile phones the Europe between January and September 2002, in euros. Overall, it is apparent from the linear, cost of demo was the highest until the cheapest mobile cell which is sim TX jumped over 20 euros to surpass the demo at the end of the period, which is really big amount.
At the beginning of the year the costs of all of them were below 15 euros and after gradual increase all of them showed significant changes, for example alpha was initially at almost 10 euros and then reached its peak 15 euros in June. This was the same with lex, after which, its costs dropped significantly to almost 7 euros which was lower than its initial cost. When it comes to lex mobile its costs started at 12 euros and after some fluctuations doubled to 28 euros.
Also, there were the cheapest and the most expensive cell mobiles. Demo costed a lot compared to others until September however, the cheapest mobile phones which is sim TX took first place with 25 euros and demo remained in the second place at the start of the Autumn in that year.
