The blame should be put squarely on the shoulders of tophatter.com. They know the quality of what is being sold and choose to look the other way for the sake of making commission and sales fees on these imitation goods. In my estimation and also the interpretation of the law this is outright FRAUD.
Inverse operations are opposite operations that undo each other. Addition and subtraction are inverse operations. Multiplication and division are inverse operations.
Command SHORTCUT KEY . Procedure: Undo CTRL+Z: To reverse your last action, press CTRL+Z. You can reverse more than one action. Redo CTRL+Y: To reverse your last Undo, press CTRL+Y. You can reverse more than one action that has been undone. You can use Redo command only after Undo command. Select all CTRL+A