The version of the Excel spreadsheet for MS-DOS is doing so well for Microsoft Corp that the company has launched a US promotion called its Win-Win Guarantee under which anyone buying the spreadsheet and later finding that another does the job better can claim a refund of the full purchase price right up until January 1, 1990, and the offer covres the forthcoming release 3 of Lotus Development Corp’s 1-2-3: to collect the refund, the customer must present the sales receipt and complete product to the dealer from whom it was acquired and Microsoft will reimburse dealers with a new copy and handling charges.
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