My mother in law gets attendance allowance, and has carers in three times a day, and her cost is £252 a month. She lives in warden !!!!!!! controlled property.
I had to fill in a 'means test' form for her, requiring details of all assets, benefits, etc.
What you pay, is for what care package you have, it will differ in all cases.
Mother in law is nearly 96, rapidly losing her sight, losing her hearing, and not too mobile now. Carers do as least as possible, and swmbo has complained at level of care given to what is being paid for. Some carers have been changed, and complaints acted upon
Once you have got it sorted, monitor it closely, its your mothers right, you are paying.
I should say that this is Social Care.....private care is a different price/package and can cost a lot of money.
When I checked a home care package for my mum when she was alive, the price worked out about the same as Care home self funding prices, which in our case was £3,300 per month !!!!!!!!!