I was already working with CalcStar (1981; from the Office suite with WordStar, MailMerge, Data Star and Report Star), then with Multiplan (1982) for CP / M and MS-DOS / PC DOS), then Quattro Pro from Borland, Lotus 123 , plan Perfect (from WordPerfect Suite), Excel and PlanMaker now! PlanMaker I now have the third version and soon the Fourth (2016). PlanMaker like it very, very well and remains affordable.