Consumer Product, as the moving party, had "the burden of affirmatively demonstrating that there [was] no genuine issue of fact on every relevant issue raised by the pleadings," Mathers v. Midland-RossCorp., 403 Mass. 688, 690 (1989), quoting Attorney Gen. v. Bailey, 386 Mass. 367, 371 (1982), and that it was entitled to judgment in its favor as a matter of law. Lay v. Shaughnessy, 2010 Mass. App. Div. 6, quoting Mass. R. Civ. R, Rule 56(c). "This affirmative burden may be met by the submission of pleadings, depositions, answers to interrogatories, admissions on file, affidavits or other competent documentary evidence which satisfies the requirements of Rule 56(e).