I am not going through with my FT acceptance with Big 4 to pursue Finance.. what will happen? (Will I owe them??)

So I did an internship with a Big 4 and then accepted the FT offer for next year. They have paid for my CPA materials and have given me the signing bonus for accepting the FT. I no longer want to pursue Audit and am going look for a finance position elsewhere (since the Big 4 here only have audit/tax/advisory. Of course this will probably burn a bridge with that firm, but what else? Will I have to pay them back for the $3,000 CPA materials and the signing bonus?