Revlon Group said that Frigitronics had agreed to a takeover offer of $34.50 a share, or about $113 million, ending a dispute that arose when Revlon lowered a previous merger offer . . . Lotus Development introduced HAL, an add-on program to its best-selling 1-2-3 electronic spreadsheet software that allows users to give commands in English phrases and to undo mistakes easily . . . Storage Technology reported that the U.S. Bankruptcy Court in Denver has authorized it to solicit approvals for its plan of reorganization under Chapter 11 of the U.S. Bankruptcy Code . . . The United States agreed to extend talks with Brazil until the end of the year to try to resolve charges that Brazilian markets are unfairly closed to American computers . . . Hughes Tool officials reported that the number of working oil rigs in the United States this week increased to 818, up 12 from last week.