Retainer Agreements: Retianer Ageement and Attorney Expenses

My question relates to legal practice in the state of: California


I have an attorney who has been working for me on a straight contingency fee of 35%.
He is doing quite well and I don't begrudge him that as I agreed to it.
On documents he presented to the court in a petition to approve claim he is charging under additional items of expense
parking fees, transportation, copying and legal research. The last one troubles me. Why would a lawyer charge for legal research is that not part and parcel of his profession and should be covered under the basic retainer agreement? There is nothing in the retainer agreement covering this topic.
I was not informed of those charges and only saw this by acquiring a copy from the courthouse.



Any input would be appreciated

Thanks!

Retainer Agreements: Retianer Ageement and Attorney Expenses