Answer:
131 Dollars.
Explanation:
The cost of her meal is $100, we need to figure out:
To find the sales tax, we put the sales tax over the total bill, 11 / 100, since the bill is 100, 11 dollars is the sales tax.
Then Add:
100 + 11 = 111
We have 111 as our bill. We need to figure out the tip, which is 20. Put it over 100, our actual cost of the dinner, 20 / 100, since it's over 100, it's 20 dollars.
Add:
111 + 20 = 131
Therefore, the total cost of the dinner is 131 dollars.
Best of Luck to you!