Austin bought his seven friends each a robot. Each robot costs $8.75. He was charged $7.22 total for tax. He left with $11.53 in change. How much did Austin start with?
Let’s work this out in a step by step way to be sure we have the right answer.
80
First we need to find the total amount for the robots.

7 robots * $8.

75 per robot = $61.

25 in total.

Now we need to add in the tax $61.

25 for the robots + $7.

22 for tax = $68.

47 total spent in store.

Now to find what was the beginning amount we take the $68.

47 total spent in - store + $11.

53 in change = $80 to start.

.

Thus, the answer is 80