 
 <translate> 100 * .8 = 80 customers bought something. That means they were worth 80 * 25 = $2000. So he gained 2000 - 1000 = $1000 from the ad. The final answer: 1000. <ibo> 100 *.8 = ndị ahịa 80 zụtara ihe. Nke ahụ pụtara na ha bara uru 80 * 25 = $2000. Ya mere o nwetara 2000 - 1000 = $1000 site na mgbasa ozi ahụ. Azịza ya bụ otu puku. 