CodeWars Fuel Calculator

script.js

function fuelPrice(litres, pricePerLiter) {
    switch(litres){
        case litres >= 10:
            pricePerLiter = pricePerLiter - 25;
            break;
        case litres >= 8:
            pricePerLiter = pricePerLiter - 20;
            break;
        case litres >= 6:
            pricePerLiter = pricePerLiter -15;
            break;
        case litres >= 4:
            pricePerLiter = pricePerLiter - 10;
            break;
        case litres >= 2:
            pricePerLiter = pricePerLiter - 5;
            break;
    }

    return parseFloat((litres*pricePerLiter).toFixed(2));
  }

  console.log(fuelPrice(5, 1.231));