How long have you had the car? You seem to be using quite a lot of rapid charge so I'm guessing you must be doing long trips requiring charging stops. What's your trip computer say the average miles/kWh is for the total mileage?
I'm somewhere over 2500 miles in 2 months but I think I've spent less that £30 on rapid chargers and the rest is occasionally on Octopus Go 5p when I need a full charge for a trip the next day, and mostly on local sun juice (which could all have been at the 5p rate if I didn't have the sun juice). Trip says the average to date is 3.9miles/kWh.
Being summer, the sun juice means our leccky cost including the car charging is not much more than the daily standing charge.