Dear Sergery,
You can also counter check with couple of latest as on today books, standards / guides for the same.
https://www.enr.com/products/category/110-books/product/32-bni-square-foot-costbook?oly_enc_id=2393B6381467I8G
------------------------------
With warm regards,
Narsimha Poloju
President | ASCE India Section Southern Region
P.Eng.,S.E, M.GI, M.ASCE, M.AEI, M.SEI
------------------------------