A tax of 20% is collected on every purchase at a supermarket.
Select all the statements that are correct.
Answer Choices
A box of chocolates that costs $10 before tax will cost $12 after tax.
A book that costs $20 before tax will cost $24 after tax.
A set of books that costs $48 after tax will cost $40 before tax.
A flower vase that costs $24 before tax will cost $22 after tax.