The Vending Machine simulator has three vital flaws that must be corrected.

$(1)$ Requirement three is that the coin input will stop once $75$ cents is reached but this is not working so customers can continue depositing coins into the machine.

$(2)$ When a product is dispensed, the coins deposited and change returned is not reset back to zero. This means that a customer could deposit $75$ cents and then keep selecting products until the machine is empty.

$(3)$ Requirement six is that the machine totals all of the money collected but that is not functional.

Please upload an image of the modified circuits to make them functional based on the flaws that need to be corrected.