What's the difference between by COUNT and NON WT PLU types?

By COUNT allows you to enter the item amount each time. NON WT has a fixed amount each time. BY COUNT does allow you to track through reports amounts sold within a plu easier. NON Wt is easier to program on the fly with a simple--'this plu' FOR 'this quantity' and amount. COUNT would be better if you print reports often and want to track more. In the end they both do the same thing a different way.