The given chart depicts the average cost of monthly contract for four different mobiles in a European country over the nine month period from January to September 2002. At the first glance, there was an upward trend in the cost of the four services, especially Alpha, which has been skyrocketed since June, while Sim TX experienced a slight decrease.
Domo started with the price of 15 euro – the highest among the four cell phones, followed by Lex, Sim TX, and Alpha, which was the cheapest with only 5 euro. From January to June, all mobile fluctuated around their starting prices, except for Domo. From April to August, it gradually increased to around 25 euro, left other mobiles behind and remained its lead. At least until September as Alpha has been rapidly risen since June and finally dethroned Domo from its leading spot. Since June, Lex also went through an increment, but not as aggressive as Alpha, ended up at 18 euro. Unlike others, after had reached the peak in June with the value of nearly 15 euro, Sim TX dropped back to about its starting price of nearly 10 euro. 
The  
given
 chart depicts the average cost of monthly contract for four  
different
 mobiles in a European country over the  
nine month
 period from January to September 2002. At the  
first
 glance, there was an upward trend in the cost of the four services,  
especially
 Alpha, which has  
been skyrocketed
 since June, while Sim TX experienced a slight decrease. 
Domo
  started
 with the price of 15  
euro
  –
 the highest among the four cell phones, followed by  
Lex
, Sim TX, and Alpha, which was the cheapest with  
only
 5  
euro
. From January to June, all mobile fluctuated around their starting prices,  
except for
  Domo
. From April to August, it  
gradually
 increased to around 25  
euro
,  
left
 other mobiles behind and remained its lead. At least until September as Alpha has been  
rapidly
 risen since June and  
finally
 dethroned  
Domo
 from its leading spot. Since June,  
Lex
  also
 went through an increment,  
but
 not as aggressive as Alpha, ended up at 18  
euro
. Unlike others, after had reached the peak in June with the value of  
nearly
 15  
euro
, Sim TX dropped back to about its starting price of  
nearly
 10  
euro
.