Answer:
Cost of Dog Food= $ 12.79
Sales Tax = $ 0.64
Sales tax is amount charged from the Individual as a tax on the thing you are buying.
Total Amount Paid =$ 20
Amount Received as Change from the customer
=Total Amount Paid - [Cost of Dog Food +Sales Tax]
=20 - [12.79+0.64]
=20.00 - 13.43
=$ 6.57
