From information given Lisa bought three items.
10 + 20 + 23 = 53 dollars ( which is total pre- tax cost)
The sales tax rate is at 7.2% . Value of this tax in dollars will be:
7.2 % of 53 → (7.2 / 100) × 53 → 0.072 × 53 = 3.816
So the tax rate value is 3.816
Total cost of items will be 53 + 3.816 = 56. 816
Rounded off to the nearest cent 56.816 = 56.80
Therefore Lisa paid a total of $ 56.80
