hello

table = document.querySelector("table");
sum = 0;
for (var i = 0, row; row = table.rows[i]; i++) {
   
   for (var j = 0, col; col = row.cells[j]; j++) {
	if (j ==2 && i > 0) {
		sum += Number(col.innerHTML.replaceAll(',', ''));
	}
   }
}

console.log({sum});