<prompt> Translate the following text to EnglishKulingana na makadirio ya uhandisi, gharama ya matengenezo ya kucheleweshwa inatofautiana kutoka 200 hadi 300 milioni katika mwaka wa 1999 na 175 hadi 275 milioni katika mwaka wa 2000.  <response>: On the basis of engineering estimates, the estimated cost of deferred maintenance ranges from 200 to 300 million in 199Z and 175 to 275 million in 199Y. 