<prompt> Translate the following text to EnglishKutumia tani 1,125 za chuma ni makadirio ya juu kwa sababu mitambo ya 500MW ya FGD ya retrofit imekamilika na tani 250 hadi 375 za chuma, au tani 0.5 za chuma kwa kila MW.  <response>: An assumption of 1125 tons of steel is a conservatively high estimate since 500 MWe FGD retrofit installations have been completed with as little as 250 to 375 tons of steel, or 0.5 tons of steel per MWe. 