<prompt> Translate the following text to Swahili7 billion contingency was unreasonable before the update, were absolutely certain that amount was unjustified given the incorporation of new cost data and shorter time frame for prognosticating.  <response>: Wakati wa kuanzisha mpango wa gharama za ziada, tulikuwa na uhakika kabisa kwamba kiasi hicho hakikuwa na haki kutokana na kuingizwa kwa data mpya za gharama na muda mfupi wa utabiri. 