Cash Register I dont know whats going on I've typed everything in the correct way what is going on

JavaScript
1

Tell us what’s happening:
Describe your issue in detail here.
SyntaxError: unknown: Invalid left-hand side in assignment expression. (24:20)

22 | cashToGive[denomination[0]] = 0;
23 | while (cashOnHand[denomination[0]] > 0) {

24 | cashOnHand[[denomination[0]] -= denomination[1];
| ^
25 | }
26 | }
27 | index -= 1;

  **Your code so far**


const DENOMINATIONS = [
["PENNY", 1], ["NICKEL", 5], ["DIME", 10],
["QUARTER", 25], ["ONE", 100], ["FIVE", 500],
["TEN", 1000], ["TWENTY", 2000], ["ONE HUNDRED", 10000]
];

function checkCashRegister(price, cash, cid) {
let amountToReturn = Math.round(cash * 100) - Math.round(price * 100);
let cashOnHand = {};
let CashToGive = {};

cid.forEach(function(denomination) {
  cashOnHand[denomination[0]] = Math.round(denomination[1] * 100)
}) 

let index = DENOMINATIONS.lengths - 1;

while (index >= 0) {
  let denomination = DENOMINATIONS[index];

  if (amountToReturn = denomination[1] > 0) {
      cashToGive[denomination[0]] = 0;
   while (cashOnHand[denomination[0]] > 0) {
       cashOnHand[[denomination[0]] -= denomination[1];
    }
  }
  index -= 1;
}
console.log(amountToReturn, DENOMINATIONS [3] [1]);
}

}

  if (amountToReturn === 0) {
      let isRegisterEmpty = true;

    Object.keys(cashOnHand).forEach(function(moneyType) {
      console.log(cashOnHand[moneyType] > 0);
      if (cashOnHand[moneyType] > 0) {
      isRegisterEmpty = false;
    }
  });

  if (isRegisterEmpty) {
    return {
      status: "CLOSED"
      change: cid
    }
  } else {
    let changeArray = []
    Object.keys(cashToGive).map(function(moneyType) {
      if(cashToGive).map(function(moneyType) {
        changeArray.push([moneyType, cashToGive[moneyType] / 100]);
      };
    });

    return{status: "OPEN", change: changeArray};
  }

}
return {status: "INSUFFICIENT_FUNDS", change: []}
}

let res = CheckCashRegister(19.5, 20, [["PENNY", 0.5], ["NICKEL", 0], ["DIME", 0], ["QUARTER", 0], ["ONE", 0], ["FIVE", 0], ["TEN", 0], ["TWENTY", 0], ["ONE HUNDRED", 0]]);
console.log(res);

  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36 Edg/92.0.902.84

Challenge: Cash Register

Link to the challenge:

2

Unbalanced brackets here

3

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