function sum(param) {
    let result = 0;
    for (let i = 0; i < param.length; i += 1) {
        if (typeof param[i] == 'function') {
            result += param[i]();
        }
        if (!Number.isNaN(Number(param[i]))) {
            result += param[i];
        }
    }

    console.log(result);
}