Bills

function bills(input) {
    let period = Number(input[0]);
    let water = 20;
    let internet = 15;

    let electricity = 0;
    let totalElectricity = 0;
    let others = 0;
    let allOthers = 0;
    for (let i = 1; i <= period; i++) {
        electricity = Number(input[i]);

        totalElectricity += electricity;
        others = (water + internet + electricity) +
        (water + internet + electricity) * 20 / 100;
        allOthers += others;
 }
    let costs = totalElectricity + (water + internet) * period + allOthers;
    let averageCosts = costs / period;
    console.log(`Electricity: ${totalElectricity.toFixed(2)} lv`);
    console.log(`Water: ${(water * period).toFixed(2)} lv`);
    console.log(`Internet: ${(internet * period).toFixed(2)} lv`);
    console.log(`Other: ${allOthers.toFixed(2)} lv`);
    console.log(`Average: ${averageCosts.toFixed(2)} lv`);
}