Vintage Software - 1997 Math Advantage 4 CD Set (missing Trigonometry CD)

Math Advantage 4 CD Set - Algebra, Geometry, Calculus and Statistics - missing the 5th CD, Trigonometry.
• MFG: Encore Software Company- 1997
• For Windows 3.1, 95, and Mac 7.0+
• Manual and Workbook included

Very good used condition: in original box; missing one (of 5) original cd, Trigonometry. armoi