Zenith Electronics Corp and Groupe Bull SA have come to a compromise on their differences over the balance due on the sale of Zenith Data Systems to Bull and the French company seems to have come out on top. Bull, which had wanted $49m back from Zenith of the $496.4m it had paid upfront, will now pay an additional $15m plus interest, but Zenith, which had been demanding $49m more, originally agreed a price of $635m for the business and ends up getting only $511m. It will also have to take an $11m charge to correct the resulting overstatement of the value in its figures for 1989.