ol

const checkCashRegister = function(price, paid, register){
    const currencies = [
        ["PENNY", 0.01],
        ["NICKEL", 0.05],
        ["DIME", 0.1],
        ["QUARTER", 0.25],
        ["ONE", 1],
        ["FIVE", 5],
        ["TEN", 10],
        ["TWENTY", 20],
        ["ONE HUNDRED", 100]
      ]

    const remainder = paid - price
    let diff = remainder
    if(remainder <= 0 ){
        return {status: "INSUFF FUNDS", change:[]}
    } else {
        const v = currencies.reverse().map(function(currency, i){
            if (diff >= currency[1]){
                var n = Math.floor(diff / currency[1])
                var rem = diff % currency[1]
            } else {
                var n = 0
                var rem = diff
            }
            // console.log(val)
            diff = rem == undefined ? diff : rem
            return [currency[0], rem, n*currency[1], n]
        })
        console.log(v)
    }

}

checkCashRegister(19, 20, [["PENNY", 1.01], ["NICKEL", 2.05], ["DIME", 3.1], ["QUARTER", 4.25], ["ONE", 90], ["FIVE", 55], ["TEN", 20], ["TWENTY", 60], ["ONE HUNDRED", 100]])