Say that I have a list of lists:

```
list_of_lists = [['5464', 49.96], ['5464', 99.91], ['5464', 99.91], ['7733', 208.89], ['8274', 233.82], ['8732', 93.93], ['88112', 274.89], ['88112', 199.75], ['9744', 404.55], ['9744', 404.55]]

```

How should I use list comprehension to find the total sum of each variable?

```
E.g. sum_of_lists = [['5464', 249.78],['7733',208.89],['8274',233.82],['8732',93.93],['88112',474.64],['9744', 809.1]]

```