I just looked over those files that I downloaded and most of them are the answer key to the previous problems. I thought everything was linked to the Sales_item.h. I was like "wtf, you need all this to make a class?" lol
Kevin145, remember that at 'some' point, you'll want to keep all of those "Types" of files separate - usually in their own files;
OBJ, BIN, CPP, EXE, H, -should all be kept in their own folders - and then have your IDE ( VS2013?) point to them ( or sometimes your code will point to them). Getting 100-200 ( or 500-800) files all in one folder, most with nearly the exact same name gets to be a real headache real fast.