function solve() {
    document.getElementById('add-worker').addEventListener('click', addWorker);

    let firstName = document.getElementById('fname');
    let lastName = document.getElementById('lname');
    let email = document.getElementById('email');
    let birthday = document.getElementById('birth');
    let position = document.getElementById('position');
    let salary = document.getElementById('salary');
    let workers = document.getElementById('tbody');
    let sumSalaries = document.getElementById('sum');

    function addWorker() {
        let firstNameValue = firstName.value;
        let lastNameValue = lastName.value;
        let emailValue = email.value;
        let birthdayValue = birthday.value;
        let positionValue = position.value;
        let salaryValue = salary.value;

        if(!firstNameValue || !lastNameValue || !emailValue || !birthdayValue || !positionValue || !salaryValue) {
            return;
        }

        createDOMElements(firstNameValue, lastNameValue, emailValue, birthdayValue, positionValue, salaryValue);
        clearFormField();
    }

    function createDOMElements(firstNameValue, lastNameValue, emailValue, birthdayValue, positionValue, salaryValue) {
        let tr = document.createElement('tr');

        let tdFirstName = document.createElement('td');
        tdFirstName.textContent = `${firstNameValue}`;

        let tdLastName = document.createElement('td');
        tdLastName.textContent = `${lastNameValue}`;

        let tdEmail = document.createElement('td');
        tdEmail.textContent = `${emailValue}`;

        let tdBirthday = document.createElement('td');
        tdBirthday.textContent = `${birthdayValue}`;

        let tdPosition = document.createElement('td');
        tdPosition.textContent = `${positionValue}`;

        let tdSalary = document.createElement('td');
        tdSalary.textContent = `${salaryValue}`;
        sumSalaries += salaryValue;

        let firedBTN = document.createElement('button');
        firedBTN.classList.add('fired');
        firedBTN.textContent = 'Fired';
        firedBTN.addEventListener('click', function(e) {
            let currentWorker = e.target.parentElement;
            currentWorker.removeChild();
            sumSalaries -= salaryValue;
        });

        let editBTN = document.createElement('button');
        editBTN.classList.add('edit');
        editBTN.textContent = 'Edit';
        editBTN.addEventListener('click', function(e) {

        }) ;

        tr.appendChild(tdFirstName);
        tr.appendChild(tdLastName);
        tr.appendChild(tdEmail);
        tr.appendChild(tdBirthday);
        tr.appendChild(tdPosition);
        tr.appendChild(tdSalary);
        tr.appendChild(firedBTN);
        tr.appendChild(editBTN);
        workers.appendChild(tr);
        return tr;
    }

    function clearFormField() {
        description.value = '';
        clientName.value = '';
        clientPhone.value = '';
    }
}