Expenses chart, simple HTML, CSS, JavaScript. First solution

Hello everyone! I would really appreciate your contribution if you looked at my code! This is my first solution so, please, no offense) Some issues bother me. First is BEM. Did I do it well or there are approaches that could help avoid repetative code? Second is JS. I have doubts about how I implemented showing sum of money. I needed to add innerHTML inside the block I didn't pick by .querySelector() and I chose a bandle of parentNode.nextElementSibling.innerHTML and I'm not sure whether this approach is okay or not. Any other recommendations are welcome! Thank you