In a bold marketing move, Microsoft is putting up billboards to advertise the Surface 2 that show off Microsoft Office, specifically Excel and its inability to add correctly.

Less than a month after a Microsoft PR executive dismissed Apple’s Pages, Numbers and Keynote productivity software as “watered down imitation apps,” the company has erected giant billboards depicting its own Excel failing to add seven numbers correctly on a Surface tablet.

Microsoft: Your home for laser-focused attention to detail since the debut of Microsoft Bob.

via The Loop