at a guess i would say it has been 13 months since damage, ten there is sorting out insurance getting quotes, he insurance company being happy ordering the stuff waiting for the stuff to get here, booking the car in, waiting for them to have time to do it, work taking place etc etc. plus if was a someone crashed into you insurance could take longer if insurance company is chasing money from a 3rd party insurance company etc.
altho when you add the above figures up like you have you would hope its not correct otherwise it wouldnt even cover the apprentices wage.