Clark County (Nev.) School District officials have finalized the estimated cost to install a new computer software system, and it's $13 million more than what they originally had approved. The Clark County School Board approved the $33 million purchase of the Enterprise Resource Planning software in 2004. Keith Bradford, the district's assistant superintendent of business, told the board this week that the system will end up costing the district $46,248,000. Administrators had feared the cost would climb to $50 million. Bradford says one of the reasons for the added cost is because the district did not understand the complexity of the program when it was purchased.