function carpet(pricePerSqrMetre, roundUp) {
    function priceForRoom(area) {
        let sqrMetres = area;
        if (roundUp) {
            sqrMetres = Math.ceil(sqrMetres);
        }
        return sqrMetres * pricePerSqrMetre;
    }

    return priceForRoom;
}

module.exports = carpet;