I can’t figure out how to stop mutilating my val and my cid arrays. I have tried to slice them into separate variables a thousand different ways. What’s the proper way of avoiding mutilation of my arrays?

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**Your code so far**
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```
function checkCashRegister(price, cash, cid) {
var val = [];
val = [["PENNY", .01],
["NICKEL", .05],
["DIME", .1],
["QUARTER", .25],
["ONE", 1],
["FIVE", 5],
["TEN", 10],
["TWENTY", 20],
["HUNDRED", 100]];
const calcQuant = (arr) => {
for (let i in val) {
arr[i][1] = arr[i][1] / (val[i][1] * 100);
arr[i][1] = arr[i][1].toFixed(2) * 100;
}
return arr;
}
const calcVal = (arr) => {
for (let i in val) {
arr[i][1] = arr[i][1] * (val[i][1] * 100);
arr[i][1] = arr[i][1].toFixed(2) / 100;
}
return arr;
}
let j = 8
let owed = (cash - price).toFixed(2);
do {
change += calcQuant(cid[j][1])
owed -= calcVal(cid[j][1])
if (owed > calcVal()) {
break;
}
else {
j--;
if (j === 0 || owed <= 0)
return change;
}
break;
}
while (owed > val[j][1]);
console.log(change)
var change;
return 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]]);
```

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**Challenge:** Cash Register

**Link to the challenge:**