John decides to install a ramp in his house.  He needs to get permits which cost $250.  After that, he hires a contractor which costs $150 an hour and the guy works for 3 days at 5 hours per day.  He also pays an inspector 80% less to make sure it is OK.  How much was the total cost?
The contractor works for 3*5=
<gadget id="calculator">3*5</gadget>
<output>15</output>
15 hours.
That means he charged 150*15=$
<gadget id="calculator">150*15</gadget>
<output>2_250</output>
2250.
The inspector charged 2250*.8=$1800 less.
So the inspector charged 2250-1800=$
<gadget id="calculator">2250-1800</gadget>
<output>450</output>
450.
So the total amount charged was 250+450+2250=$
<gadget id="calculator">250+450+2250</gadget>
<output>2_950</output>
2950.

<result>2_950</result>