Recharacterizing Roth IRA contributions made over several dates for 2022

Hello,

I have to recharacterize a total of $6000 of Roth IRA contributions made over several dates during the year.  Do I need to create a separate Recharacterization for each contribution date *$2500, $3000, $500)?  If so, how does one calculate the earnings or loss (I'm sure it's a loss) on those contributions? 

 

I was able to calculate the total loss for the period from the date before the first contribution to the time I recharacterized... should I just apply the same rate to each contribution?

 

Thank you very much for any guidance.