I need help to get when user click any option in dropmenu

const updatePrices = () => {
            const totalPriceElement = document.getElementById('wapo-total-order-price');
            const distanceSelector = document.getElementById('yith-wapo-option-value');
            const replicatedTotalPriceElement = document.getElementById('replicated-total-price');
            const devolucionesMovesElement = document.querySelector('#devoluciones-moves');
            const totalInstalacionElement = document.querySelector('#total-instalacion');
            const campoAdicionalElement = document.querySelector('#campo-adicional');

            if (totalPriceElement && replicatedTotalPriceElement && devolucionesMovesElement && totalInstalacionElement && campoAdicionalElement) {
                const totalPrice = parseFloat(totalPriceElement.textContent.replace('€', '').trim()) || 0;
                const devolucionesMovesValue = totalPrice * 0.3;
                if(distanceSelector != null){
                  distanceSelector.addEventListener('change', () => {
                    devolucionesMovesValue *= 1000;
                    console.log('Moves Total Price TEST:', devolucionesMovesValue); 
                  });
                }else{
                  console.log('Error')
                }
                
                const totalInstalacionValue = Math.min(totalPrice * 1000, 9999);
                const campoAdicionalValue = Math.min(totalPrice * 0.7 * 1000, 9999);
                console.log('Moves Total Price:', devolucionesMovesValue); 
                console.log('Total Price:', totalPrice); 

                replicatedTotalPriceElement.textContent = `${totalInstalacionValue.toFixed(2)} €`;
                devolucionesMovesElement.textContent = `${devolucionesMovesValue.toFixed(2)} €`;
                totalInstalacionElement.textContent = `${totalInstalacionValue.toFixed(2)} €`;
                campoAdicionalElement.textContent = `${campoAdicionalValue.toFixed(2)} €`;
            }
        };

        const totalPriceElement = document.getElementById('wapo-total-order-price');
        if (totalPriceElement) {
            const totalPriceObserver = new MutationObserver(updatePrices);
            totalPriceObserver.observe(totalPriceElement, {
                childList: true,
                subtree: true
            });
        }

        updateValoresMovesVisibility();
        updateOutsideVisibility();
        updatePrices();
    }

Help pls I need finish it