[wp-hackers] Dynamic ajax tariff/price/services form ?

[b2]

Hi , is there any plugins (or maybe some quick howto/examples) out, or
something to achieve something like this ? 

http://www.telnet.bg/index.php?mod=calc
http://arenanet.tv/connect.php

Basically i want to setup custom service/tarrif/price calculator , and
cannot find any quick solution.
I tried price-calc but  it so basic , so if i had to use it , i'll have
to rewrite it at all (i'm not familiar with ajax/js , im ok with php) ,
the plugin developer cannot provide any support at this tume ... so
thats not a solution. 

thanks in advance