Still not accepted on 4th June 2018. I do not believe that DL would suddenly stop accepting an answer that they did previously. It was probably never accepted. I also tried "sums up", but that was not accepted either, even though this later one was accepted in another question in the same lesson, when "ella" was "la empresaria".
Why "She counts those numbers" is not accepted? In another exercise "El suma las manzanas" is translated as "He counts the apples". You can also count the numbers.