goldMine.js

function goldMine(input) {
    let index = 0;
    let locations = Number(input[index]);
    index++;

    for (let i = 0; i < locations; i++) {
        let avgProfitGoal = Number(input[index]);
        index++;
        let days = Number(input[index]);
        index++;
        let profitSum = 0;

        for (let day = 0; day < days; day++) {
            let currentProfit = Number(input[index]);
            index++;
            profitSum += currentProfit;
        }

        let avgProfit = profitSum / days;

        if (avgProfit >= avgProfitGoal) {
            console.log(`Good job! Average gold per day: ${avgProfit.toFixed(2)}.`);
        } else {
            console.log(`You need ${(avgProfitGoal - avgProfit).toFixed(2)} gold.`);
        }
    }

}