FreeCodeCamp change calc

change.js

let  getCidTotal = (cid) =>
  cid.map(x => x[1]).reduce((x,y) => x + y);


function payout(owed,dv,v){
  // if we have less than a d, or we owe less than a d skip
  if(dv === 0.01)
    console.log(JSON.stringify({owed,dv,v}));
  if(v < dv || owed < dv) return;
  var i = 0;
  while(v >= dv && owed >= dv){
    console.log(JSON.stringify({owed,dv,v,i}));
    i++;
    // damned rounding error
    v = (v - dv).toFixed(2);
    owed = (owed - dv).toFixed(2);
  }
  if(i < 1) return;
  if(dv === 0.01)
  console.log(JSON.stringify({owed,dv,v}));
  return {i, paid: i * dv};
}

let dvMap = {
  "ONE HUNDRED": 100,
  "TWENTY": 20,
  "TEN": 10,
  "FIVE": 5,
  "ONE": 1,
  "QUARTER": 0.25,
  "DIME": 0.10,
  "NICKEL": 0.05,
  "PENNY": 0.01
};

function checkCashRegister(price, cash, cid) {
  let totalChangeNeeded = cash - price;
  let owed = totalChangeNeeded;
  let cidT = getCidTotal(cid);
  //console.log(JSON.stringify({price,cash,owed,cidT}));
  if(price > cash || owed > cidT) return {status: "INSUFFICIENT_FUNDS", change: []};
  if(owed == cidT) return {status:"CLOSED", change: cid};

  let rem = cid.map(x => [...x]).reverse();
  //console.log(JSON.stringify(rem));
  let resp = {status:'OPEN',change:[]};

  for(let i = 0; i < rem.length; i++){
      let [d,v] = rem[i];
      var dv = dvMap[d];
      var r = payout(owed,dv,v);
      //console.log(JSON.stringify({d,v,resp,owed,dv}));
      if(!r) continue;
      if(r.i > 0){
        owed = Math.round(100 * (owed - r.paid)) / 100;
        resp.change.push([d,r.paid]);
      }
  }

  if(owed > 0.01){
    console.log(JSON.stringify({resp,totalChangeNeeded,owed}));
    return {status:"INSUFFICIENT_FUNDS", change: []};
  } 

  return resp;
}