John needs to get a new seeing-eye dog.  The adoption fee cost $150 for an untrained dog.  It then takes 12 weeks of training which costs $250 a week.  After the training, she needs certification which costs $3000 but her insurance covers 90% of that.  What is her out-of-pocket cost?
The training cost 250*12=$
<gadget id="calculator">250*12</gadget>
<output>3_000</output>
3000.
The insurance pays for 3000*.9=$
<gadget id="calculator">3000*.9</gadget>
<output>2_700</output>
2700 for certification.
That means she needs to pay 3000-2700=$
<gadget id="calculator">3000-2700</gadget>
<output>300</output>
300.
So her total cost was 150+300+3000=$
<gadget id="calculator">150+300+3000</gadget>
<output>3_450</output>
3450.

<result>3_450</result>