For your consideration, here is the Learn to Subtract Basic Math Fundamentals DVD, new, sealed, Collector's Edition, digitally remastered, from Treasure Box Collection, runtime: 30 minutes.  It has a little wear on the shrink wrap.  It will be mailed in a box for protection.  Item pictured is the actual item up for sale and comes from a non-smoking household.  (407.3n-.9dx7)