This is an incomplete attempt at solving the cash register freecodecamp problem

cashRegister.js

function checkCashRegister(price, cash, cid) {

  let change = cash - price;
  let total = 0;

  let totalCID = cid.forEach((item) => {
    total  += item[1] 
  });
  console.log(total);


  if(total < change) {
      return  {status: "INSUFFICIENT_FUNDS", change: []};
  }
  if(change === total) {
      return  {status: "CLOSED", change: cid};
  }
  if(total > change) {
    let newChange = [];

    cid.reverse().forEach((elem) => {
       while(change >= elem[1]) {
          var quo = Math.floor( elem[1] / change);
          change === (change - (elem[1] * quo));
          newChange.push([elem[0], elem[1]])
       }
    });

      return  {status: "OPEN", change: []};
  }
}

checkCashRegister(19.5, 20, [["PENNY", 1.01], ["NICKEL", 2.05], ["DIME", 3.1], ["QUARTER", 4.25], ["ONE", 90], ["FIVE", 55], ["TEN", 20], ["TWENTY", 60], ["ONE HUNDRED", 100]]);