Here are the spending totals for the campaigns, including SuperPAC spending (which impacts Jones and Farkas) and subtracting out refunds to donors.
Schleifer led in spending in June, as expected, but Mondaire Jones's outside SuperPAC friends brought spending on his behalf nearly even with Adam. To put this SuperPAC money in context, Jones benefitted from more outside PAC money than all NY congressional candidates with the exceptions of our neighbors in NY16 where a staggering amount of outside PAC funds flowed: Elliott Engel ($1,728,832) and Jamaal Bowman ($1,868,020). [Source: Open Secrets, which comes up with a higher number of $576,879 for Mondaire's outside PAC money than I can find: $545,085.]
The most astounding spending number, however, is Adam Schleifer's total. Fundraising grandmaster AOC was the only NY Congressional primary candidate to outspend Schleifer, who spent about $10,250,000 on her primary race. The only other New York candidates to top $4mil in spending were, again, our NY16 neighbors. With their outside PAC money, Jamaal Bowman spent $4,044,429 and Eliot Engel spent $4,495,849.
Now, the number you've been waiting for: per vote spending:
Again, I'm including outside PAC spending for Jones and Farkas, so you might see lower $/vote numbers for them elsewhere. Schleifer's number is extraordinary and maybe even unprecedented. I can't find any other examples of serious primary candidates spending anything close to $400 per vote, not even Mike Bloomberg in his presidential and mayoral campaigns. Can anyone cite examples of candidates who received 10,000 votes in an election who spent at least $400 per vote? Look at that Mondaire Jones $/vote numbers. Along with Mondaire's stunning victory, that $65/vote spending efficiency belongs at the top of Charlie Blaettler resume (although I'm sure he'll argue that it's really $48/vote without the outside PAC money).