// MUJ :D
Array.from(document.querySelector('.default').querySelectorAll('tr')).reduce((acc, tr) => {
    let num = parseInt(tr.children[5].textContent)
    if (!isNaN(num)) {
        return acc + num
    }
    return acc
}, 0)

// GPT
const total = [...document.querySelectorAll('.default tr')]
  .map(tr => parseInt(tr.children[5].textContent))
  .filter(num => !isNaN(num))
  .reduce((acc, num) => acc + num, 0);
  

// Variants 
let total = 0;
document.querySelectorAll('.default tr').forEach(tr => {
    let num = parseInt(tr.children[5].textContent);
    if (!isNaN(num)) {
        total += num;
    }
});



const total = [...document.querySelectorAll('.default tr')].reduce((acc, tr) => {
    const num = parseInt(tr.children[5].textContent);
    return !isNaN(num) ? acc + num : acc;
}, 0);



const total = [...document.querySelectorAll('.default tr')].reduce((acc, tr) =>
    acc + (parseInt(tr.children[5].textContent) || 0), 0);
    
    
    
const total = [...document.querySelectorAll('.default tr')].reduceRight((acc, tr) => {
    const num = parseInt(tr.children[5].textContent);
    return !isNaN(num) ? acc + num : acc;
}, 0);