The 10% price is for the 90% coverage, I believe the "standard" plan only refunds 80% and if you bought the standard plan it is less costly.  My suspicion is you paid a $600PP nonrefundable deposit in addition to the $489 insurance.  If you cancel you will lose the $489 plus $120 of the $600 or $609PP.  Ironically had you not purchased the protection plan you would have only lost $600PP. 
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