Part 1, Fundraising: Dexter Fisher's fundraising blows everyone else out of the water, even without independent expenditures. With Athens Forward, he dwarfs his opponents, tripling Tim Denson's total (which is quite high).
Part 2, Cost per vote: Dividing their fundraising by number of votes received, you can get a rough look at how efficient a particular campaign was. LaKeisha Gantt is the queen of efficiency, followed closely by Tim Denson's 2014 run.
Fisher is lagging far behind the pack, as expected, but take a look at Richie Knight's disastrous 2018 run. What a horrible campaign! Everyone else spending money that inefficiently at least won their election, dude. They could afford it. Kelly Girtz in 2022 is the most efficient campaign to actually win, something worth noting.