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?
First we need to find the total amount for the robots. 7 robots * $8.75 per robot = $
<gadget id="calculator">7*8.75</gadget>
<output>61.25</output>
61.25 in total.
Now we need to add in the tax $61.25 for the robots + $7.22 for tax = $
<gadget id="calculator">61.25+7.22</gadget>
<output>68.47</output>
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 = $
<gadget id="calculator">68.47+11.53</gadget>
<output>80</output>
80 to start.

<result>80</result>