Split the Bill

<cfscript>

    function splitBill(total,partysize) {
        var party = ArrayNew(1);
        var extra = 0;
        var loser = 0;

        if((total OR partysize) LTE 0)
            return party;

        for(i = 0;i LTE partysize-1; i=i+1) {
            ArrayAppend(party,numberFormat((total/partysize),".00"))
        }

        extra = total - ArraySum(party);
        loser = randRange(1, partysize, 'SHA1PRNG');
        party[loser] = NumberFormat(party[loser] + extra,".00");

        return party;
    }

</cfscript>