if语句不在for循环中执行

Question

不确定为什么第二个for循环中的if语句没有执行，任何能指出我正确方向的人都会受到赞赏。

function checkCashRegister(price, cash, cid) {
  var change;
  var balance = [];
  var total = 0;
  for (var i = 0; i<cid.length; i++) {
    total += cid[i][1];
    change = cash - price;  
    if (total < change) {
      return "Insufficient Funds";
    } else if (total === change) {
      return "Closed";
    } 
  }
  for (var x = 8; x >= 0; x--) {
    if (change > cid[x][1] && change <= cid[x][1]) {
      balance.push(cid[x-1][1]);
    }
  }
  return balance;
} //end function

checkCashRegister(19.50, 20.00, [["PENNY", 1.01], ["NICKEL", 2.05], ["DIME",     3.10], ["QUARTER", 4.25], ["ONE", 90.00], ["FIVE", 55.00], ["TEN", 20.00], ["TWENTY", 60.00], ["ONE HUNDRED", 100.00]]);